Yes I leave it there and get 4G everytime and have no trouble getting calls, email, texts or anything. For me, when I switched it back to GSM/CDMA I was having more issues.You'll notice when you reboot, it automatically goes back to gsm/cdma. I change it to GSM only and get all my data. Not sure why, but I get data back every single time doing it this way.
Mine is exactly the same. After a reboot, I change the radio to 'GSM only (PRL)' and leave it. Then 4g/3g kicks in and everything works 100%.
If I lose data (go underground in a train or something) I do have to reboot and toggle the radio to get it back. But it takes less than a minute and is very consistent at getting data up and running again.
Overall, this is a VERY functional ICS ROM.
Side note, is there an easy way to de-black my Gmail? I find it kind of hard to read/organize stuff when everything's monochrome. Thanks!
RAZR Maxx - Two steps forward (Maxx>>>Droid1) and one step back (My bootloader! What have they done to you!?!)