This is the best app I have ever used. The customer service staff was very patient in guiding me to use it.

Not the best app for printing on demand. You have to make the product on Shirtly, then upload each shirt to your Shopify product pages (each variant) then when customers order, you will need to re-create the shirt (select the fabric, upload the design, etc). After only a few washes, the design is already cracking/fading and not worth the price to order from them. Their website claims a shirt is in stock but it could be our of stock in their warehouse (it accounts for Shirtly's main warehouse, not the warehouse where the shirt is being made) so we had an order wait almost a month before our customer received it. Giving a 2 star as support is pretty good at getting back to use, but their website definitely needs some more work to make it more user friendly.