Not necessarily, I agree with what xg4bx said about people being impatient and whatnot. Most people try it and send it back the same day, probably specifically because everybody tells them it will suck and they need to send it back as soon as the forum finds out they've ordered it. I'm not saying it's the best PV in the world. An average 510 hit is generally bettery than an average blu hit, but I find myself having to top off/change cartridges a lot more with the 510. That atty puts out so much vapor that it just burns up all the liquid after 15-20 drags sometimes. And the Blu can produce a hit comparable to the 510.
As far as batteries only lasting 10-20 minutes is concerned... Either A: you're lying, B: You chain vape and take the biggest drags known to man, C: your batteries are old/worn out from all your constant vaping, or D: Your batteries are and were defective from the beginning. I had batteries that would only take 15-20 minutes to charge when I first got my blu, and they would only last 20-30 minutes. I called customer service. They told me to try leaving them on the charger for like an hour or two and ignore the blue light. I tried that and it didn't work, so I sent the batteries back under warranty. In a week I had two new batteries that work just fine. Bad product? Not really. Bad quality control? Certainly. I think that's part of the problem. A lot of people get faulty hardware and think it's how the product is supposed to be and just get frustrated and fed up. I can understand that to an extent, but that's the impatience xg4bx was talking about.
The reasons I went with blu are because I could find a lot more about them, they were relatively cheap compared to other models I found on my own before this forum, and they had the 25 cartridges included(which I thought was a good idea cuz I was planning on using them, thinking refilling would be a pain). The PCC was a nice touch too. Others I was looking at included those crappy sites that have plain and menthol only and keep billing you every month and sending carts whether you need them or not and the green smoke. Before this forum, I didn't know what a 510 or anything else was. I made an uninformed purchase and there's better out there, but the blucig is not as horrible of a product that most make it out to be. That's all I'm saying. If it's so bad, why does mine work just fine and is nowhere near as bad as some of the horror stories I've heard about it? Explain that one for me please. I'm not trying to recommend people get the blu. But enough with all the crazy not entirely valid bashing. The Blu is a lot more like a cigarette than the 510 in terms of how much vapor is produced. The 510 is more like hitting a .... or a blunt.
When I used to play airsoft and visit forums, people complained left and right about how a company called HFC's guns were horrible and had no hopup. Everybody loved UHC. Well, I found out HFC DID have hopup, they shot generally with more power and accuracy than UHC, were more reliable, and much more durable. I still have my first HFC gun, from like 8 years ago. It works just fine. Meanwhile, every UHC gun except for the one most recently purchased and barely used is broken and gone. The one they kept promoting the most had all kinds of crap breaking off of it and kept jamming all the time. When it actually did shoot, it curved hard to the left every time. The majority is not always right. The blu is probably not sufficient for most heavy smokers or impatient people, but it's not the big POS most people make it out to be.