I totally agree with Ferret. I've used all three on deployments and have EoTech on for personal use. Though I'm running a Acog on my issue this roll around.
At Gunsite our line had a few M68's (aimpoints) go down. Have had some in units do the same. Though that was in 2006-2007ish all the issues with them were popping up. Seem my Soldiers haven't been bitching about the ones they're using now.
I've seen multiple friends get IEDed with deaths and burning shit everywhere. M4's and crew served weapons destroyed. One M4 was bent in half all the hatches and seats blown off/out of the MRAP, the turret ripped off. We took the EoTech off the nuked M4, re-zeroed it and it shot fine. A very tough optic.
The only issue I've seen with it is the battery compartment can get gummed up if batteries are left there to rot. That shouldn't be an issue for you. Heat, like 130-140 degrees can melt the glue for the little connectors in the battery compartment, but it still works fine, with a little bit of fat fingering.
The 20 MOA circle with the one MOA dot is the reticle that kicks ass. The 20 MOA circle covers a body sided target fast, for close quarters, and the 1 MOA dot is very useable for long range. A pard of mine doinked a dude planting a mine at about 550M with it un-magnified. Very nice reticle.