Transdermal trest is great stuff, I used ol dermatrest and I can tell you now, it is worth it. Also got a bottle of Td trenavar that I haven't tried yet. But i know it's gonna be good too once I get around to trying it.
I personally think they are great. Better absorption and timed release makes blood levels more stable. Also helps avoid some stomach issues. Only downside is possible transfer of hormones from skin to skin contact with others.