Well, I got a Blu in the mail about 6 days ago and I gave up on it after the second day when I used all my cartridges. The Blu is a piece of junk, but I really LOVE my 510. After I write this review I am going to the post office to return my Blu. I will put it in the box terry used to ship me the 510 hahaha
First Impressions:The 510: I opened the box and pulled out the battery. Definetly bigger and slightly heavier than the Blu but it looks real sexy. Fits well in my hand and feels pretty much like a real cigarette. So far I like it.
PEC Liquids: I got six 6ml bottles. Two Menthol, two Cherry, one Grape and one Vanilla.
Packaged neatly, labled clearly. I got alot of juice for what I paid. Pretty sweet. Terry was even awesome enough to include a free 6ml coffee flavor as a gift. Righteous!
Blue Foam: Well, can't say too much here. I got alot of foam for a dollar. It's blue.
Preformance:The 510: I was awfly excited to get this thing rolling. I put it together and put in a stock tobacco flavored cartridge. I took a nice long drag and in my head was thinking WTF. I couldn't feel anything on my throat, so I assume that there is no vapor coming out. But once I exhaled...

oh my gosh. I got a huge cloud and I couldn't help but giggle like a little girl.
I continued to vape the tobacco cart until it was gone. Lasted very long compared to the Blu and each rip produced a large cloud of vapor; so far I'm impressed.
The Blue Foam mod: It was very simple to do after watching a couple youtube videos a few days eairler. Filled up one cart with 17 drops of Cherry, one with 12 drops of Menthol. I took a hit from the Menthol and I can really feel it in my throat this time. I exhaled and WOW.
What a
MONSTER cloud of vapor. Looks like I was smoking out of a bong.
PEC Flavors: So far I have only tried the Menthol and Cherry, I will update you later as I try the other ones. The stock tobacco flavor was a bit sweet, didn't really taste like tobacco. It's not something I would spend money on. The menthol flavor is amazing. Really gives a good throat feeling and makes alot of vape. The Cherry is pretty sweet and really tastes like Cherries. Alot of vapor from this one too.
Overall, I'll have to give it a 10/10! Amazing
And for Terrys customer satisfaction rating, 10/10! I will never have to smoke a cigarette ever again!