If you show dedication, you will get a lot of attention. Something as simple as showing up 15 minutes early to skip a little extra will catch the trainers eye and they will put in a bit more effort in teaching you.
The personal training is very good. Pot or Det are two of the best trainers. Pot his a very good teacher and speaks english very well. His kicking and punching style is very brutal but his clinching is very technical. He breaks down the clinching techniques in best of all of the trainers I have worked with. Pot fought Buakaw twice and was ranked higher than him at the stadiums.
Det is a bit smaller than Pot and was a Rachadamneon champ. He is all about technique and speed. He has very pretty Muay Thai. Here is some video of Det working pads for the Korean fighter Su Jeong.
YouTube - Su Jeong Sinbi Muay Thai Gym
My trainer this year is Eyat. I normally have Pot as my trainer, but some how I was paired up with Eyat this year. He has a totally different style than Pot. He only stops to correct you once or twice, then bashes you until you fix it. He's not being a dick by any means, but is much more hard on me than any of the other trainers...except maybe Met, who is all business. This is my third time at Sinbi and fifth time in Thailand, if I can't remember to avoid/block/catch a round kick to my body by now, I deserve to get bashed...lol I guess it paid off because I managed to block or avoid gotobreads ridiculously hard right kick when we were sparring

hahaha