Well CloudyPro is indeed good and solves the hissing sound issue.
The downside, as with many custom roms, are random reboots. For me about once a day or so.
Pretty annoying each time.
I have been using this ROM for weeks and I haven't had a single unexpected reboot. I doubt that it is ROM related.
Unless it's related to your G2 model. I have the D802 as mentioned in my footer.