I've done it with far too many pieces of equipment. My ATK, all my Laney gear (2 heads and a 4x10 cab), my Crafter acoustic bass, and most expensively my Berg NV215. Was very fortunate that they've all turned out very well, a few of them were kinda stupid things to do.
The NV215 I bought cos I did alot of reading into it, and also talked to the UK Berg dealer before he sold it to be (very helpful guy, had a good 10-15 minute chat with him about it cos he wanted to make sure that a NV610 wouldn't suit me better), that was pretty sensible, but still kinda silly, I did have a couple of days to send it back to him if I didn't like it though.
The Laney stuff wasn't as stupid, cos I know I like Laney amps and I wasn't disappointed with any of the 3 pieces of gear I got. Still, I've heard some very nasty Laney gear so it was kinda stupid, one of them was an absolute steal, but unfortunately I kinda know why now (bloody things blown and I'm going on a major hunt to find parts to fix it, if it gets fixed it'll remain a steal though

).
With the Crafter, I can't quite remember why I bought it, I think I might have read a couple of reviews, but maybe not even that, I think I'd seen that Crafter was a pretty solid name before I bought it at least, very lucky with that one.
The worst of all is the ATK though, I simply bought it cos I liked the look of it cos of it having a nice natural finish and the cool tele style chrome bridge. Very very lucky with that, because it's turned out to be the most comfortable and best sounding (unplugged at least - working on that bit though) bass I've ever played.
Either way, I'll probably buy something based on reviews and such again, but I wouldn't recommend it, I've usually done it due to a mixture of impatience and a lack of any places that stock alot of the stuff I'd wanna buy in the fist place...