I've had a few prints done by Starbucks and they seem to do a pretty good job, although they are kind of expensive and there is always a line.
I tried a couple of landscapes but didn't like the frenzied look probably due to the caffeine. I'd suggest you only use it for action shots.
However if you have a print that just lays there and needs more energy this could be the right developer.
The down side is when you try to drymount them afterwards the little buggers won't sit still on the mattboard. You need to let them sit for a few hours before you even attempt it.
That's my experience anyways, you're mileage may vary.