WOW airlines - Good or bad?

We flew WOW r/t SFO-CDG this Feb. Liked it and hard to beat the price. Planes were clean, seats comfortable, flight attendants good (2 were beyond exceptional), and we actually liked their food, considering it's airplane food. However, they do not have any entertainment.
Loved Keflavic airport in Iceland.
The only negative for me is that it's not non-stop, you have to change planes in Iceland which is weather dependent. Leaving CDG, plane was delayed 5 hrs due to weather in Iceland. For that reason, I will consider Norwegian Air next time.

Took WOW last year from Nice to Reyjkavic for a connecting flight to Denver. The price was certainly right, although the overhead bin space was tiny -- truly for accessory bags and not what many people consider carry-ons. You get at least as much as what you pay for, and it wasn't a luxury flight, but was safe and efficient, and as I said, affordable!

There are two WOW cases at the top of the Chris Elliott website at this moment:
http://www.elliott.org/

3 of us flew WOW Rome to Iceland June of 2016 for €99 each and it was great. Change in Cologne, no glitches at all, and since then, constantly check their fares and destinations when going to the EU

We had a 21" rolling suitcase and a full backpack, both fit easily in the overhead bin along with other passenger's stuff.

One of Elliott's cases, lost luggage, is not unique to WOW and why I only do carry-on (for my clothes).

I've flown round trip to Paris twice now on WOW. My next trip I'm flying IcelandAir for the first time. I'll see how they compare.

It isn't a non-stop flight. Since the trans-atlantic flights cross the north Atlantic anyway, it's about the most efficient one-stop flight you will find. From Baltimore it's about ten hours to Paris and about 11 back.

The planes are essentially the same as any other airline (for better or worse). They are new and clean, no more or less room than any other major airline.

The cost of the flight is a la carte, you pay extra for each amenity - food, beverage, entertainment, luggage. I don't mind this at all. I find I can stay inside their free carry on allowance (and prefer to do so). If you can't, even the added cost of checked luggage probably still beats other airlines (many of which now charge for luggage). For me, I don't want anything on the flight over. I'm interested in sleeping as much as possible. For the flight back, I can grab some things from the little stores that are after security in CDG, including a small bottle of wine, sandwich and maybe some chocolate. Many people had take out meals they purchased at CDG.

I was stuck in Keflavik on my first return flight. The runway was closed due to high cross winds and our plane couldn't leave Paris because of it. We ended up taking off about two hours late and landing about an hour and a half late. Since WOW flies all their legs into Keflavic, and gives themselves about an hour and a half to sort everyone into their second leg, my flight had already left. WOW told the 60 or so passengers who missed their connection to go to the shuttle bus outside the terminal that would take us to a hotel. When we got to the hotel, they checked us in and told us to be back in the lobby/lounge at 7 for dinner (delivered pizza). During the evening, they posted everyone's new flight information in the lobby. When we went to bed, two people didn't have flights but they did by the morning. They paid for breakfast buffet at a nearby hotel then lunch at a restaurant near the hotel, then shuttled us back for our flights. My new flight went into Boston instead of Baltimore, then they put me on a Jet Blue to Baltimore that landed too late to get public transportation into DC - the taxi was $100 (split with another passenger who was stuck).

I felt WOW did the best they could to resolve a situation that they had no control over, provided everything I needed at no cost to me, and got me home as quickly as they could. Quite a few of the passengers weren't happy about not having more personal interaction with customer service over the airline's plan for them. From my perspective, I was happy I didn't have to sleep in the airport and I didn't have to arm wrestle with customer service over food and lodging.

Brad, what entertainment are you referring to? The only thing I'm aware of is some planes have some iPads available for a fee. There is no in-seat entertainment on WOW. One reason why they're so low cost.

Yes, they passed out something like an Ipad with entertainment pre-loaded (I assume). I don't know how much they charged?

They charged $10-$20 for the use of an iPad. They didn't have a lot of them, so not something I'd count on.

I should add something about Susan's 21" rolling bag. The first time I flew WOW that would have been an acceptable carry on. By the second time I flew they had changed the standards. The carry on allowed now is much smaller and lighter. They consider a normal carry on to be a "large carry on" and charge something extra for it. The free carry on is supposed to fit under your seat but no one said anything to me when I pulled out my flight things and stuffed the bag in an overhead. That might be because of the seat I was in, I was by the exit with no seat in front of me.

Good catch Brad... I meant to say a 20" rolling suitcase/carry-on.
We flew this past February.
I don't remember paying to bring my 20" carry-on on the plane. Weight limit in Feb was 22 lbs.
(Edit: the more I think about it I'm sure we paid for the 20" at time of booking. But the amount is $40-$50 which still makes total cost much less than other airlines... even Norwegian. Unless you get a screaming one off deal. Which is why I didn't remember paying... : )
As we were waiting to board I was amazed how lenient WOW was... just about everyone had a rolling carry-on, a backpack, a purse (women) and 2-3 bags full of stuff from airport stores.
You can never count on any airline being lenient though.
On our way back, we had an oversized duffel bag full of purchases which we had to check and then take to a different counter b/c it was oversized. We were expecting to pay for it but there was no charge. No clue why.