I love them, especially in a dark brown suede. But, I would worry about them making you look stumpier. I'm 5'1, and there seems to be a magic length for everything that either makes you look taller or shorter.
not really age appropriate imo. Def. will be looked at as a slut, not sayin you are but that's what people will think when they c u. Posting a link to the boots would also help us get an exact picture of what you are talking about.
If you like them, go for it! You could pull it off, just be careful what you wear with them...for ex. a dress with them may cut your body off and make you look shorter, but with dark denim jeans it could look totally cute:)