I got this because it was a bargain and it has not disappointed me, it feels nice in the hand, the way you pop in and take out the battery is so simple and works perfectly, wish more companies would use this design. I use 22mm MTL atomisers and they all fit very nicely but any over 22mm and you will get overhang, it's perfect for me though. The device goes up to 70w but I never even go up to 20w because of the way I vape and I'm getting just about a full day of use before needing to put another battery in. This is an older device but it's form factor and features make it one of the nicest single battery mods I have used. Wish I could track down a different color and have a couple of them going, I like it that much.