While they advertise a 10 minute change, that only applies if you're the only person there. Each time I've gone here it's taken at least 30 minutes.
There's not much they can screw up here as long as you stick to the basic oil change, which is exactly what you should do. I would never let these guys touch anything else - let your regular mechanic or dealer take care of the other services they offer (tranny fluid change, etc).
I'd only ever recommend coming here if you have a coupon. They often mail out $19.95 coupons, and since they use a good quality oil like Pennzoil, that's actually a pretty good deal. Their regular price is $31.95 and that's pretty expensive for an oil change and the superfluous extras that come with their 'signature' oil change.