ive been following phalloboards for a year now - pmma is something i've considered. theres been great results, no change, and AWFUL results that would make you cringe.
After following all the reslts for the past year i determined it wasnt for me - too many lumps, bumps, bruises and unnatural looking gaps.
As of this post - most of the top doctors performing PMMA for girth are unable to increase the gland size....so you end up having a baby dick penis head...with a very fat girthy cock and usually have a huge gap under the penis head. It looks VERY unnatural. Imagine beatle juice after his heads been shrunk. Its that unnatural looking.
Do your own research and consider the risks. This is still relatively new - having become popular the past couple of years so the LONGER term effects are still unknown. Not worth it in my book.