Baclofen is a bit of a funny one, some people get a really good subjective feeling out of it and I know a few people who swear by it when coming down after going out and partying on MDMA, whereas others say it doesn't do anything for them. Myself, it just makes me feel a bit floppy and I'll take one before bed if I think I'm going to need extra help getting to sleep.
I take it for muscle spasms cause by a multiple sclerosis type condition and it definitely works really well for that. It did had a slight anxiolytic effect for me when I started taking it regularly (2-3x day) and increased my tolerance to caffeine which was a nice side effect as I love drinking coffee and Coke. I am surprised it goes for so much on the onionwebs, it's not like it's difficult to get it prescribed. That's down to its low abuse potential, although it's true that it's not terribly well known outside of neurology/addiction medicine