My experience is as follows:
The SGS2 is the best phone on the market. Bar none.
S8 changed this great phone into an awesome phone.
GPS instant lock. SMS, MMS etc. all work great.
I have not had any issues as others have stated. Don't know it is because I am just lucky or followed directions or did not screw with the phone. It just works.
SGS2 with S8
Captivate with S7 ( wife now using and loves it )
HTC Pure ( worst phone I ever owned )
iphone 3 ( stolen by a security guard )
Others to numerous to list
Agreed, I replaced the MMS file to fix the MMS issue. That's all I need. Will keep this S8.1 ROM for awhile. Even out of support from Mike, I still could NOT find any other issues. Much better battery life compares to other ROMs out there for ATT S2 phones.
Using ENtropy latest kernel