I have a very similar (maybe the same) Adidas bag and the zipper broke on an end compartment after a few trips. I've kept the bag but we can't use that side pocket anymore.
We also have and love the LLB duffel (no wheels) in Medium for week long trips. I think they're a bit too big for a weekend and would go with a small (or small + backpack for the 4 day trip). I just put 2 kids into one medium bag for shorter trips. We've had them for 7-8 years, zippers are strong and they look brand new.
Ds1 (2006). Ds2 (2010). Ds3 (2012).