Several of us took advantage of the eBags clearance sale at the start of the first summer under covid and gave initial impressions and reviews after taking short trips using their new purchases
https://community.ricksteves.com/travel-forum/packing/july-4th-sale-at-ebags
but it wasn't until now that I could really put my Weekender Jr through its paces -- I'm back from a 7-night trip, and it worked out very well as an alternative carry-on to the RS convertible.
The Weekender Jr. expanded is about the same capacity as the RS Convertible unexpanded, with the major differences being that the Weekender is hinged like a book and the RS opens from the top. I like the RS and have used it for a few years, but it's often bigger than I need as a light packer, and the Weekender proved to be a better fit - the Jr. size is an inch or two shorter and rests on my back easier. Both bags have internal and external cinch straps; the Weekender has another grab handle at the bottom front, and an eyebrow or cap pouch instead of the belly pouch that marks RS luggage, plus a slash zipper pocket on the front. The laptop compartment has a divider and sits against your back, while in the RS convertible the compartment is away from your back, which I find unbalanced (that compartment was probably originally intended for a jacket, though, not a laptop, and it works for that).
Outbound I used a large folder, a small cube, a cables/chargers pouch, a shoebag to hold sandals, and the RS civita shoulder bag inside the main compartment and the zippered mesh inside-the-lid area, with an iPad and backup paperwork in the laptop compartment. On the way back I used the civita as my personal item and had the laptop compartment stuffed with museum exhibition catalogs that I got for souvenirs/coffee-table books. If I was packing for longer than a week I would probably use a medium cube instead of a small, and add a sweater or jacket in addition to the one I wore on the plane.
The extra height of the RS convertible means I can stuff both a sack lunch and a hat in the top; with the Jr. I could only fit the hat. The RS has a waist belt while the Weekender has a sternum strap; I prefer the sternum strap (watch for squishing whatever is in your shirt pocket, though!)
The Weekender Jr. did not fit into the overhead compartment of a Bombardier jet - I'm forgetting the model number -- on first try at least so I put it in a locker at the forward part of the cabin. As with the RS convertible no gatekeeper or other staff ever looked sideways at the bag as not a legit carryon size, especially considering the behemoths that we all see people tugging and rolling on to planes nowadays. Overall I would say that going forward this eBags is going to be my go-to choice for travel, with the RS convertible carryon now held in reserve for occasions that call for bulkier clothes or an extra suit. And unexpanded it will serve for trips that only require one change of clothes.