I've got a reflector (green one) and a mars 2 (black/graphite one).
The white ones are the mars 1.
@witchyhour uses mars 1 and some (I think) cheaper ones as side lights and is pushing towards half pound plants.
I believe they had some counterfeit issues, which isn't really down to them.
Apart from 1 single blue led that sometimes doesn't strike up (out of .... erm... a lot) I've had no issues.
They are a bit on the hefty side, so if you have a cheap tent (plastic joints) you may have to reinforce.
Itisi
it is isn't it?