The build quality is great. It has taken lots of bumps and bounces....no issues yet.
Secure bag? Depends. There are three points of attachment.
At the top, there are two little "arms/hooks??" that combine to hold the top of your bag. These are intended to go through the carry handle. I have tried it with the top of my straps over those arms/hooks, but the bag hangs lower and doesn't seem as secure.
At the bottom, there are two straps....they hook to the sides of the bag somewhere and that is the difference in if your bag is secure or if it sways. I've attached the strap hooks to the bottom of my bag straps and they don't seem to hold the bag tight enough. I'm okay with the little bit of swaying, but if the cart hits a bump or something and tilts a bit, the bag shifts and sometimes that's enough to make the cart fall over. I have seen players (with Rovic carts) hook the straps into their water bottle holders (if they have one on each side), I have seen the hooks attached to the front opening of the bag. My RidgeRoller V2 has a "strenghtening" strap on each of the backpack straps. This strap isn't sewn all the way down, there are gaps, and I've put the hooks in those gaps...that has worked the best for my bag.
So, yes...the bag can be secured very well, but it might take some trial and error to find the best way to secure your bag on the cart.
One other thing, the tires are foam...that means they can't leak. I live in Arizona and have had cactus spines, mesquite thorns, and a nail stuck in my tires. I just pulled them out and kept going. If whatever cart you decide on doesn't have foam tires (or if they are an add-on), I highly suggest converting to foam tires.