Hi there .....
So glad you are exploring getting a Ponto. I have been wearing mine 10-15 hours every day for nearly two years and love it!
To answer your questions .....
1) I had my abutment implanted at the same time as my translab surgery two years ago tomorrow, with no difficuty whatsoever. For those who are doing this post-op, I do not know of any specific waiting time. Many doctors put it in under local anesthetic and it is placed in good, solid bone, not directly on the translab surgical site. You need to check with the doctor who will be doing the abutment implant for his/her protocol/guidelines. In most cases, it is a relatively simple out-patient procedure. The wait time comes following the implant, to allow for osseointegration to take place with the titanium post and your bone before attaching the processor.
2) I do not know about future replacements yet for sure, but since it is considered a necessary prosthetic device, it is my opinion that my insurance will cover needed processor replacements, as well, if medically indicated or it stops working. Oticon Medical has a warranty that you need to check, also.
3) I have above normal hearing in my "good" ear and still do. The Ponto receives sound from your deaf side and conducts it to your hearing ear so it should have no effect on the hearing levels of your good ear. Your audiologist should program your Ponto to your specific hearing needs. Hearing is a brain-thing so it all depends on how your brain accepts these additional sounds. I am finding that even two years later, my hearing seems to be continuing to improve. I am assuming it is because my brain is still adapting.
4) I can think of no reason not to get a Ponto, unless you have some other underlying medical condition that could be affected by it.
Feel free to PM me if you want to talk.
Clarice