I think Im gonna try T&T Film Pro this time...Would be nice to know too. I only heard of 3M as the pricier option (rumored to provide a certificate of your tint's legality for placating cops?), and Dream Color in Shau Kei Wan (They claim to use Taiwan or China tint, but the 'installer' is outsourced I'm guessing.).
Never used either of them for tint, but hopefully will when I take delivery... (Counts calendar weeks. Again.)