After many hours of trying to work with them I am done. My notes to them are:
Suggestion - Fix the problems!
Marvick Shop: When you sell a Module or Plugin you should be able to upload it and it works. You shouldn't have to mess with code in order to make it work. Anyone, new or seasoned, should be able to upload and use your application. Shame on you for producing a product that doesn't work out of the box. You should notify customers that you need to be an expert in Joomla and PHP before purchasing this product.
If the tweaks and fixes worked, I wouldn't be writing this right now. But, they don't. They only uncover additional problems with the application. Shame on you!
This review has nothing to do with the program itself. But the installation procedure of a component in Joomla. The guy is new at Joomla and got problems with uploading the program to the server of Godaddy. Because of the directory permissions. He never came to edit the files because he got problems with the dir. permission. Now he gives MarvikShop the fault and that's not right. A review should be going about the program, not about the installation of a component in Joomla within Godaddy.