I used them a few months ago, before startup school. I can't remember the turnaround time as I had a wedding on the horizon and that time is a blur, but I remember it being reasonable and delightful. It's totally worth the price. Doing paperwork is the last thing I want to be doing. On my last startup I must've filed for tax extensions for almost 10 years in a row. I love Stripe for removing all of those headaches.
I tried finding a confirmation / "you're done" email from them but can't find it, so I'm not sure how long it took. I did end up getting the SV bank hooked up but haven't moved everything over there yet.