Hi Blazed-kitty,
That's not too many questions. There are different protocols and mine is atypical so I can't answer to what it's like to get the 10 day protocol or the inpatient. Mine is outpatient and has tapered from every two weeks to every 6-8.
You can read all about my infusions here. I have documented quite a bit of that experience. You can use the search feature at the top of the page to find other threads.
http://neurotalk.psychcentral.com/thread220186.html
My relief was not immediate and was not earth shattering which was what my PM expected. It built over time but was definitely noticeable. I have tolerated the ketamine well, though I do feel kinda bleh the day I get them. It is anesthesia after all.
For me they have been a big help and I plan to continue with boosters. I hope these get you some relief if you decide to go ahead.
Sending hugs and healing love,