So far I've ordered two items from teespring. The first being a tee; having compared my three older shirts with printed designs (and having treated each equally) I can say the printed colors, almost exclusively black, on my teespring shirt have shown significantly greater signs of degradation. This was most notably apparent after a single wash. Though the image is still there and the shirt it's on is, comparing to a Duluth Trading CO tee, serviceable in terms of durability and fit.
The second was the Lucas plush. Firstly, though the pre-order took much longer than projected, I personally found their response/difficulties perfectly reasonable. My inquiry was responded to in a satisfactory and timely (24h) manner, and the mass e-mail update they sent everyone on the pre-order was reassuring in that they were indeed experiencing unforeseen delays as well.
Now, the Lucas plush itself. Despite the minor loose bits of fabric and less than serviceable speaker inside, this plush was VERY much worth the wait. The build design is phenomenal in maintaining the true shape of Lucas (especially the legs). It's colors are vibrant and stitching is sharp. Also I must mention it wouldn't seem like it could tolerate much abuse; I wouldn't trust it to last with an unmindful child.
I'll perhaps be more careful when picking out tees with them again, but I'll certainly be picking out from them again. Wholeheartedly recommend (as a consumer of the end product).
I'd also like mention and thank the customer support team, who actually read and respond to these reviews. Highly commendable and appreciated.