I did my first tint in Ecotint Taipan. I'd say their workmanship is pretty good. Layering and cleaning is done inside aircon room, which is important. The only problem i had was bubbling which they reduced but still there was some bubbling mark left behind right until i sold the car. However it was a small part and not really a big deal.
I actually tried out Tint Shoppe, also in Taipan and i installed the VKool for my dads car. I'd say comparing both, Tint Shoppe was a lot more professional and the salesman actually slowly explain to me the advantages and difference between different tint. During the cleaning and layering, was there for about 2 hours. Their workmanship also very good. I was quite impressed by their professionalism and the workers are pretty friendly too. I was quite hungry so i called my cousin to pick me up and went for lunch. 2 hours later they called me and when i inspected the tint, it was almost perfect. No defects at all. So comparing both, the edge goes to Tint Shoppe though i was actually still quite happy with Ecotint.
As for Brothers tint, i really have no confidence.