Veneers - your personal experience required? please read and advise

I know there have been many threads on veneers, but I would love to hear your personal advise on this.

I need to get veneers as my top front 4 teeth are not all the same size. I have had orthodontic treatment before and although it aligned my teeth, the dentist couldn't do anything for the actual size of my teeth - understandably.

I went to see Dr. Michael from Dr. Michael's himself. Friendly chap, didn't charge for the consultation or taking photos and x-rays and took his time with me. He suggested having veneers on at least 8 of my top teeth where as I only wanted 4 as the rest look fine to me and I don't feel comfortable with the filing and playing around with the other teeth unnecessarily. He tried to explain that to achieve the perfect smile, he would need to work on more teeth, as my smile is big, although i still felt that when my smile was at the widest, i could get away with 4 veneers or maybe pushing it 6.

He kept saying that his quality of work is the best as he uses the best labs in Dubai and in USA and hence more expensive. But when i asked him, what if my veneer cracks (not due to my own fault) would it be replaced free of charge, he was vague on the whole warranty thing. He showed me photos of his work, I know that his work was not photo shopped but although the smiles looked nice they just looked too fake and white. I have friends back home who have had their smiles done but look natural. Also i asked him about the filing, and he again was vague.

I am scared of going to the wrong dentist who ends up giving me bulky or fake looking veneers and someone who ends up filing my natural teeth down unnecessarily to make his work look perfect.

I have seen other threads on veneers with Dr. Madhu and other recommended dentists. Ladies, I would be ever so grateful, if you have had veneers done with Dr. Michael or any other dentists that haven't filed your teeth down too much, and you have managed to get a nice smile without doing too many teeth, please please advise. I need to know the process, how long does it take, is there anesthetic given, can it be done in one day or do i have to go for several visits, costs per veneer and do you get to see the BEFORE? Also have you had your gum line raised with lazer due to the veneer - he also suggested that for one or two teeth - in Dr. Michaels case, he uses some pen to draw a liquid on the tooth to show you how it would end up looking (looks 90% accurate to the real thing from what i saw in the photos). This way you know what it would look like exactly on you before you go ahead?

Thank you so much.