Pros
Great, capable people everywhere. Zoomer going out of business might suggest otherwise, but I would attribute that more to a big shift in the investor market as well as the fact that countless competitors emerged into the food delivery market, including behemoths like Uber and GrubHub. What Zoomer loses here will be others' gain; a lot of fantastic folks just hit the job market and pound-for-pound I doubt you'll find people more devoted or hard-working. This wasn't a laid-back 9-to-5 environment filled with people watching the clock to go home. People worked well together and went hard to the paint to help Zoomer succeed.
Cons
Ratings-wise I'd knock a little off for weaker compensation and benefits, a necessity given budget constraints. It was a startup, after all. On balance, no regrets. Took a big swing and just didn't get there, was great to be a part of it. A cautionary tale for others: the contract-driver industries are everywhere and you're always vulnerable to forces beyond your control.