Speaking personally of course.....
Really like the G930's. They fit my head really comfy, and the cups fit around my ears just fine. It isn't as heavy as it looks either, and for me is barely noticeable that I have them on. I was expecting them to be more weighty than what they are.
The microphone fits neatly on the left earphone and folds up out of the way when not being used (and is automatically muted). When I need to use it, just tilt it forward and the mic automatically enables and is flexible enough to be able to bend into position to suit.
The software is really easy to use to set the usual mic volume, bass, treble etc. and also provides info of battery charge level. When using in wireless mode an audible bleep is heard to indicate that there is less than an hour of charge remaining when the battery is getting run down. As I'm typing I have them plugged in recharging, whilst listening to my music.
iRacing and C.A.R.S. sound great too, much better than my weak baseless old Phillips headset, lol. Enabling the surround when racing gives definite change to the sound and allows you to hear what's going on around you.
If the earphones are not being used by any software after a short period they go into sleep mode. To re-activate just requires the power button on the left earphone to be held in for a few seconds and they blip back in to life. I have not experienced them going in to sleep mode when in use, which I think had been reported in some reviews.
The left earphone also the power on/off button, a small switch to enable surround sound, which again I find works well. There is a further volume adjust wheel and a button to mute the mic. There are also 3 additional G-Keys that can be preprogrammed from within the Logitech software for setting a hot-key command for listed software like next track, previous track, pause etc.
When fully charged they run wireless for quite some time and would easily last for a prolonged driving session.
I tend to use them when just working on the PC, playing music from iTunes and for me the sound is great. Also, having the wireless option I can just get up and wander off around the house from the PC for a drink and leave the earphones on.
When all said and done, I'm really happy with them glad I bought them. I can't compare them to any other headsets in the same category/price range, as I've never had any, as I've always had the cheaper headsets.
I appreciate there are alternatives out there that may out perform the G930's in some areas, but I wouldn't class the G930 as a bad headset. It is effectively the G35 with wireless option, so I guess if debating between the two, for arguments sake, the kicker is going to be whether you want the wireless option.