I'm with Brent, I think online reviews are pretty much worthless. (And that's kind of too bad, Angie's List started in a building about a block from where I used to live, passed it all the time going to the grocery store. It had such promise.) If you're going to try to assign any validity at all to them you need to read them for context. I find in particular that many of the negative reviews are based upon unreal expectations. Sort of like "it didn't fit my car, I tried to force it with a 10-lb sledge and it broke." Or "I haven't tried it yet but when it arrived by UPS the box was torn". Or "I asked for free advice but they said they could not diagnose over the phone, I had to come in and let them look at the car". And you have to realize that for someone to post a review in the first place they have to be motivated. At least in Yelp you can look to the person's posting history and see that of the last 15 reviews, 15 have been negative. Well, seems to me that says something about the person, not necessarily the businesses reviewed.
I looked at a few slide hammers online recently. Seems there are some that are threaded SAE on the end and some are metric. Quite a few complaints from folks who wanted to use a cheap metric threaded slide hammer on a good hardened SAE threaded end. Somehow it's the slide hammer's (or the vendor's) fault that the two didn't work together. That's not the tool's fault, that's operator error.
JayJay