I used to sell dye sub set ups about 2 years ago and found that it was an ideal process for creating mugs, mousepads, tiles, and other promotional items. I found that the garment decoration options for dye sub were/are very limited. When using dye sub for garments you are restricted to certain blends of fabric and certain colors. In my opinion, it is not a flexible/versatile enough technology for a "garment" decorator. However, there are definitely niche markets for this process.