I always fancied trying a mechanical mod but wasn't 100% sure I'd like it so I got this on abit of a whim. It helped that I liked the look of it and my favourite colour was in stock. Also the price, worth a shot I thought. So I have my M57 in red. It's a good size, pretty big! But it's super light, just the weight of the 2 batteries really. I have small hands but it fits aok and the firing trigger (it's DEFINITELY NOT a button!) is the lightest resistance. If it gets loose it looks like it could be possible to tighten as flat screws appear to hold it in place. Not that I have any problems with it and hopefully won't do but thought I'd mention it. The lever lock that prevents the trigger from firing is easy to use, my little finger manages just fine to do that. I lock the trigger when I put my mod on a table/work top else it doesn't sit flush, unless on an edge. Because this mod is so BIG a small RDA is going to look lost on it. I'm using my gold Oulmier VLS with a single coil set-up and have no connection issues whatsoever. Obviously it would handle a twin coil build happily enuff but I am yet to experiment with that, happy to stick with a big single coil build for now! The ONLY reason I have given 4stars not 5 is because the battery door doesn't sit flush and occasionally I catch it and pull the door off! Now I know it happens I'm wary about it and I haven't done it for a while. It's no biggie really and certainly doesn't put me off using my M57. It's got a tough grippy feel to the casing and am hoping it will last a good while. PROPER pleased I brought it, am not scared of mechanical mods anymore!! It really is a pure vaping experience!! Thanks to GSF for having the M57 in stock and at SUCH a fantastic price!!!