I just use the Coilmaster mini tab that came with my kit, more as a stable building base although I do test fire and etc. I also check what my mod's reading. At my kind of resistances, that's pretty much all I need, and I do like having something simple that (I hope) won't die on me as I continue using it, although even if it does, I will build to fill on that platform rather than my (much pricier) DNA mod that is made of leather. I kind of shudder to think of the idea of building, testing, and assembling on top if it (if it were even any kind of stable base, which it isn't) given some of the things I have done along the way with coilbuilding... LOL.
I'm very happy with my cheap but so far indestructible Ohm's reader, and it's always nice to get a double-check when I finally put the darn tank on my mod. I find the kits useful for lots of things, although I will agree they aren't the most robust of tools at times, I do find certain things fairly useful....
I guess if you want to build down to 0.02 or something, maybe having something reliable would be useful but I'd think that for most folks, a very expensive Ohm's reader isn't necessary.... Although I guess there are some times it might be useful.
Anna