Laser hair removal for underarms

Has anyone tried it?

I usually wax my armpits. But I would like to go for a permanent hair removal.

I have done laser for chin at Kaya. The results were quite satisfactory. The only thing is Kaya is bit costly.

I have a few questions.

1) How painful is the process? The reason I'm asking this is because my mind is still not ready for it. Because though all websites claim that the pain is bearable. I think its not true. Because which each session they keep increasing the heat and I found the pain deadly when I took laser for chin.
I guess it would be even more painful because the underarms hair is thicker than chin indeed.

2) How many sessions will be needed?

3) How much does it cost totally?

4) Where did you do in chennai?

5) Please share your experience.

Thank you in advance