Firstly the actual website is far better than using an app. The website is clear, easy to use and is great for editing your designs. It is also easy to edit your design on any number of tops, including women's and children's. Zazzle does have a sizes and measurements chart and you can view this from the product page. Ordering again was very easy.
I was able to get a discount and use my own designer discount!
The one thing Zazzle has over Snaptee is the free shipping.
I went for exactly the same kind of design: Mermaid Sunset on a Men's Basic White T-Shirt,
Full Price £17.95
Discount 15% £2.69
Designer Earnings Discount £1.55
Zazzle emailed me with the order confirmation and the next day they emailed me again saying my order had been shipped.
This time the tracking was available to my country but the only information it said was it was shipped and when. I guess as it's standard free delivery there isn't any actual tracking.
The order arrived about 10 days later which is in the 5-12 days after manufacturing time given.
Below are the photos of the t-shirt that arrived so you can see the packaging.