Until you have used one of the better 5 or 6 volt PV's, it's not possible to make a good comparison, IMHO. When you have read about 200 posts on the Blu with 96% of them being negative, it's not hard to figure out it is one of, if not the worst, PV's made.
Now if your level of "good PV" means you take a puff once an hour, throat hit is not important, consistency is not important, getting liquid in the battery is not important, battery life is not important but looks is important, then the Blu might be considered a good PV.