Dyna Comp - good on batteries should be the first thing I say. Lasts forever. Gives a darker style of compression/sustain than say a BOSS CS-3. The DC takes a while to get use to. Needs a lot of fiddling around with to find a good setting. Often I find the output setting needs to be changed whenever your volume knob on your amp gets changed. I give it a 7/8 out of 10.

Micro Amp - I used this thing once until I got my Tube Adapters. I just happened to be playing around with it when I had it almost fully cranked and my amp was soaring. This turned my overdriven "clean" channel into a lead monster. It was amazing. Gives a really nice boost to give a nice lead sound in the clean channel. I find it doesn't do much unless it is almost or fully turned all the way to the right. A decent pedal, but really depends on what your looking for. Definetly try one out before you buy it. And more importantly try it out on your rig at a volume/setting that you would be using the amp in.