I have some questions before I paid the Premium Verision

Hi VillaTheme Team,
I am interested in ChinaDs plugin and intend to buy it on your website- before that I want to hear from you on below questions.

1.On the price and service: The Plugin Premium version needs $39.Is it a monthly subscription or it is a-deal-in-one, meaning I don’t have to pay more to get your continue service ? Is there any extra cost for any other services?

2. On the plugin- What is the average time for ChinaDS to import a single product from Taobao ?
I saw many related topics complained about the loading time. I want an official answer to make right decision.

3.On the plugin- is it compatible with all the WordPress theme?