i have a zoomed 500r, a johnson control, and a ranco.

personally my favorite is the johnson control, just cause it is smaller then the ranco. they are both very durable and can handle alot.

i will say the zoomed is not bad. i used one for my ball's tank for a couple months. the only downside is there is on temperature readout, it's pretty much guess and check. but since i will be getting a rack june 6th (yay!!) i decided to get a better thermostat. if you do get the zoomed what will happen is you will have it for a couple months/years and then later you will want a ranco or a JC. i keep a zoomed around just in case.

i have a extra zoomed barley used, pm me if you decide on the zoomed.