Experiences using Tapstitch?

I’ve been looking into Tapstitch for their POD service and I’m just looking for feedback on their quality and customer service.

I am considering a POD service just for a trial run to gauge interest in my designs (I already have a small/medium following for my art on Instagram) so it feels like the perfect set up to avoid shelling out lots of money for things that might not sell. If there is decent interest, I would probably just move to a local screen printer eventually.

I’m open to other suggestions as well.