I've ordered twice from TDD. The first time a couple tshirts and a diaper. Later, I ordered a few more tshirts.
The customer service is excellent-- Shelly is quick to respond to emails, quickly fixed a glitch in the invoice setup (didn't take off the sale discount) by refunding the sales amount, and quick to ship.
I love the colors and the quality of work she does!
My one caveat is that the children's sizes seem a little smaller than expected. A 10-12 fits on my normal-sized 6yo girl for instance. I don't know if the dye process (and "finishing" of the dye) shrinks the shirt a little, or just the shirts she's using run smaller. So the shirt I got for my nephew I gave to my son. I didn't bother Shelly with this issue b/c the shirt was great and there was no way I was going to send it back. I just found someone else to wear the shirt. So when I ordered the next time, I just sized up appropriately. I did buy an adult large as well, and I think that ran more true to size.
I definitely join the ranks of those who sing her praises: great WAHM, great service and great products.