I have a couple of sets of the Ebags and a couple of the Rick Steves ones. I have had the RS sets for about 5 years and I really like them, they stretch a little so they are easier to pack. The Ebags sets I got last year and they work great as well, they are a little less flexible but because of that they are a nice consistent shape.
The Ebags ones come in different sets, for us the medium sizes work best. I can pack DD's and my clothes by outfit - DH's cargo pants are a bit bulkier and would not fit more than one in a pack

The big size fits my 22" carry on suitcase - I can stack 2 of them and have a little room on top but none on the sides. With the medium I can put 2 side by side and one on top so I have space for shoes and toiletries.
If this is your first set you may want to get a small size as well since they are great for underwear, toiletries and electronics. I packed all our chargers, batteries etc in one - very easy to keep track of all those random cables!
A couple of days ago Ebags had a medium size on sale - it was not a great print

but who is really going to see them!