I have not yet played Fireteam 2.0, but have had a couple of small games using Version 1 and really like this game. Fireteam 2.0 retains the same simple rule mechanics as in the original, but adds additional rules, scenarios and unit information.
The rules are very easy to pick up with alterrnate team activations, consistent mechanics for all combat and using D6s. The core of the system is based around just a few statistics for each of the various units and with very few additional modifiers to work through. The rules are intended to cover platoon level games for the post-war period, but I don't see any problem adapting them for WW2 or near future as the mechanics are robust enough to stand a bit of tweaking.
If you are looking for a super detailed then Fireteam 2.0 is probably not for you, but if you are looking for a playable and (I think) engaging modern game then these are well worth a look.
[5 of 5 Stars!]