Disclosure: This mod was sent to me for the purpose of review by HealthCabin.net. The item can be found here. www.healthcabin.net/voopoo-drag-157w-box-mod-p/13905.html Some all round pics. Lets firstly talk about construction. I really haven't found any issues with regards to build quality, it's a good solid well made enclosure, the 510 isn't some cheaply press fitted rubbish it's mechanically held in with torx screws, there's no wobble or rattle with the buttons, the inside is nice and clean and i don't have any door wobble on the one i was sent either it's held firmly by two strong bar magnets so top marks as far as construction goes. So how about design? It's a little bit old school and personally i like it, i know some people don't like boxy box mods but i do. There is however two issues i do have with the design side of things on this box. First one being the overall width on the box is only 24mm, why would they not make it 25mm when 25mm is becoming a standard sized atty nowadays? It's not that the overhang is terrible it's only half a mm either side it's just annoying because it shouldn't be an issue at all, just make the box a mm wider. The second one is they have cut a step into the sides all the way round the mod so even with a 24mm atty you end up with a gap on the sides where that step is cut into the top surface, see the pic below for what i'm talking about it's a 24mm wide Troll RTA. It doesn't actually overhand the sides of the mod you just have a gap where the step is cut. So the last thing to cover is performance. I really do like the board used in this mod a lot. The display is nice and big and bright, the menus and functions are easy to navigate, you have the usual TC options Ni/SS/Ti and via the software you can add a TCR option too, don't understand why it's not installed out of the box but it's easy to add from the software, there's also power curve settings and temperature curve settings it's a good deal of functionality. I don't have fancy diagnostic tools but it does feel like it's delivering the power it's set at too, it doesn't seem like it's underpowered. But the best thing is it's instant, there's no noticeable delay when firing or ramp up time if you've got it set for example at 90W and you push that button you get an instant 90W delivered, very impressed with the board. There is also the software available here. en.voopootech.com/download-service/? It's kind of a very cut down version of escribe, you can customise some screens and set temp curves/ power curves do firmware updates etc just basic stuff really. Very intuitive and easy to use. All in all a great device other than those issues with the width and the step on the edges.