My experience, Sept 2016, was not great but not worse than many other airports. The walk to ground transportation was pretty long, signage sometimes gave me pause but it's not horrible.
I didn't/never check bags which is often the biggest issue people have with airports. If that's why CDG has such a bad reputation, I'm glad I was able to skip it.
I boarded the tram to get to a different terminal. These things could show a little more sense of urgency both with their speed and length of their stops. I had purchased a ticket for Easybus(?). 2 euro to get downtown but comes with an appointment time I needed to make or risk losing the value of my ticket. I got to a place that seemed exactly as described, but no merchandising or signage to indicate I was in the right place. I waited until it was clearly past my appointment, with no sign of the bus I was waiting for, then went inside and asked at an information booth. Apparently I was in the right place and the busses run about every 45 minutes. My ticket is only good on the next bus on a space available basis, so I skipped it and headed to RER. These busses, I believe, are now discontinued.
The signage was somewhat confusing for finding the RER. I boarded the tram that takes you between terminals. Does it really want me to get off at parking lot B (can't recall exactly which parking lot) to take the RER? Yes, apparently so.
No line to buy an RER ticket from an agent, but I'm no tourist so I wait for a machine instead - then can't get it to take any of my cards. Now a really long line at the ticket window. I decide to try the machine again, this time with success, but at least a half hour lost to the process of getting in line twice for the machines and using the machines twice. I was somewhat surprised that my 10 euro ticket to Gare Nord doesn't transfer to the rest of the metro system. I had to buy a carnet and use a second ticket to get across town.
Yes, it did take me longer to get out of the airport than I normally take but not all of that was the airport's fault. Ticket/toll machines having trouble accepting your card seemed to be common everywhere I went in France.