Hi, Karen,
I've worn a BAHA Intenso for a little over a year now and am very happy with it. I'm sure that other BAHA wearers will chime in as well with their comments. Here are some brief answers to your questions.
I have certainly not regretted getting my BAHA! I find it to be a very big help in coping with SSD.
They are not much trouble at all to care for -- I just keep mine clean, remove the battery each night, and store the BAHA in the little drying jar that's provided by Cochlear (the BAHA manufacturer). I replace the battery once a week. I like to compare it to contact lenses in terms of care.
I also wash and blow dry my hair every day -- you won't be wearing your BAHA when you do this! I don't aim the dryer at the abutment for a long period of time when I'm drying my hair, but that's not a big deal. BAHAs shouldn't be worn in the shower, pool, or when you're really hot and sweaty (exercise, yard work, etc.) and, of course, you'll remove it at bedtime.
Attaching the device to the abutment was a little difficult for me at first. You can't really see what you're doing, so it's a bit like Pin the Tail on the Donkey for a while. I think you'll be surprised at how quickly you'll learn to attach it on the very first try, and it will soon become second nature. I'm so used to it now that I automatically feel my head before I step in the shower, and, if for some reason I put it on in the morning before I take my shower I put a sticky note with "BAHA" written on it on the bathroom mirror as a double reminder to take it off before I shower later. It's easy to forget that you're wearing it.
Does it give you a sense of direction? Hmmm, that's a little harder to answer. The longer you're SSD the better you may become at determining directionality (by honing your other senses in a given situation), but I'm not sure that can particularly be attributed to the BAHA. I know of at least one doctor who contends that the brain permanently loses its ability to determine directionality within a short time (possibly weeks) of becoming SSD. If you believe that theory, then no, neither the BAHA nor anything else will help you with directionality. If you don't believe that theory, then you may feel that the BAHA helps in that regard.
Best wishes as you continue your research.
Catherine (Jersey Girl 2)