i do it all the time and i have to say it turns out damn good.
what you do is:
go to a place to get it cut and tell them to just trim your hair or whatever you want done, but tell them you dont want it styled
go home and add the finishing touches and style it yourself, it looks so much better if you style it yourself my cousin was a master i learned from the best.
my sister did once and she looked so funny, she figured that if she cut it right at the skull it wouldnt come back, for months she had like spiked bangs, it was so funny
I do it all the time. My hair is really messy so I can't really fuck it up. But I'm not going to any more, I'd rather pay some money for a good cut, cause sometimes I don't do the best job at layering it well. If you hair is super straight you really shouldnt try though.
I haven't had my hair cut for 2½ years, because I think it's way too expensive (at least it is in Denmark), so I tried myself and now I have to pay a hairdresser to fix it, stupid, stupid, stupid!
I have been cutting my own hair for the past 2 years, saves some money...i just grow my hair long for winter and cut it short in the spring, and if i fuck it up, then i have to buzz it shorter. It's incentive for doing a decent job. That and you can't cut your own hair sober.