Hi sachin,
You've asked some really juicy questions so I'll give them a shot.
1. I'm very happy with my HT, check out my blog.
2. No.
3. Yes. The majority maintain their hair, a small minority are lucky to get regrowth.
4. I had FUT and it didn't really hurt. FUE is less painfull. But it's subjective and everyone is different.
5. I wouldn't let Alvi Armani touch my head.
6. It's been around the corner for the last 10 years. I wouldn't bet on it.
7. Research as much as possible is the key. People who understand HTs and don't have unrealistic expectations usually end up happy. If you have a lot of native hair left, it's highly recommended to take Propecia after your HT.
Hope this helps.