Been doing a fair bit of meph recently (up the hooter - i'm sure this is a baaaad idea but still) and i do enjoy it, here are my pros and cons
Pros
A good initial buzz, very similar to coke imo, chatty, loved up, talking about 'deep' things with your mates. Appreciation of music is hightened and simple stuff like watching tv, films, or even cleaning the house actually become very enjoyable!
You get that nice mdma type high for an hour or so after
It's pretty manageable, there's no mega come up
Very cheap!
Nice to think you're doing something not many people know about (sad but true)
Cons
Way, way too moreish - you get that high followed by the little low which precipitates immediate thoughts of 'doing another', again very similar to chop
I'm sure it's pretty bad for you (although what drugs aren't?!)
Think it's pretty weak, not half as strong as decent mud, tolerance is built up very quickly and easily
Slightly weird comedown, not half as bad as some recounted on here, but definitely weird, hearing voices, seeing things etc
Anyway, that's my twopence worth!