I find that the trifecta is quite a good design and the future of all batteries I think. This being one of the first, I don't feel that it has reached it's full potential quite yet.
Good Stuff:
I highly recommend a Trifecta for it's vital clutch factor. Every one should have a trifecta as a backup. If your other batteries are charging, they are not usable while charging, but the Trifecta is.
Even if you are only able to plug it in for 5 minutes and need to take it with you out to dinner and then back home, that's enough power to keep you going.
I feel like I'm digitally connected as I Vape, drawing power through my computer as i vape... almost like I'm part of the Matrix or something. ;P
It has an extra LED on the shaft of the battery, not just the tip. Extra cool factor there, it really catches attention.
Bad Stuff:
It's very hard to keep the cable fitting to the battery. I usually have to plug it in, and rotate the battery around wait a second to make sure the light stays on to say its charging. If it goes off, it means it got a little bit of energy but is not charging. Then, I rotate it again and wait... rotate it a bit again and wait.
The puffing in automatic mode requires a bit more suction than normal maxx fusion batteries. The manual mode is quite good though, amazing in fact. I use it almost primarily in manual mode.
Overall:
I think everyone should have one trifecta for it's clutch factor. It is highly versatile and can meet the needs of most.
I personally do not care for being subtle when it comes to vaping, however the Trifecta is not very subtle about the fact that you are smoking an e-cig. (yeah... I go through fast food drive thrus or walk around outside bars and people look at me puffing on my double blue LED Trifecta)
If anyone wants to get into randomly recruiting people to go the way of Bloog, it's very easily noticable while using a Trifecta, because of the eye catching double LED. I have spoken with several random people from bars and drive thru fast food places about Bloog, and have converted some.