You might consider this more of a blog post for my experience with this ROM.
I've been perusing the XDA forums just seeing what's being developed for the SGH-i777 and check for updates for the Siyah kernel I used to root my phone. I recently had a SERIOUSLY scary issue with my phone which brick'd it and with the help of Ultradroid for putting the call out for help and Ronnie and Ollie for answering that call I was able to get my phone back to exactly where it was just before I brick'd it.
So, beaming with confidence and anxious to see what JB might be like on my phone I kept a look out on XDA for any JB ROM's for my phone when I came across this one ([Rom] AOKP Jellybean l Task650 & Ktoonsez (9/4) - xda-developers). I read through the OP several times to see what bugs were known and skimmed through a few of the most recent pages (with 2,298 at the time of this writing there was NO WAY I was going through all of that) to see what users might have been dealing with.
I decided that the problems most people were facing had to do with them either not following install instructions (which seemed SUPER simple even with my limited Android knowledge) and/or not finding the settings in the ROM so I read the instructions, read them again, waited a couple days, read a few more posts, read the instructions again, waited a couple more days, read the instructions, read FAQ, read the instructions one more time and dove in!
The installation went off without a hitch and as of this writing I just got all my apps back on it and I'm about to set about getting my homescreens set up and so forth. So far so good, I'll post again soon.