maplemusic.com é seguro?

Wanted to buy music form this site. They have music hard to find elsewhere. They advice to first try the download procedure because they will not refund a purchase. So I tried it and succeeded in downloading the test file they propose and it worked well. But nothing happened after I've got through with the PayPal procedure to finalize my purchase! Fortunately, nothing was charged on my credit card. My advice: do not buy there before they fix this test procedure. My second advice: if you nevertheless buy there, use PayPal. Other thought: might be due to Firefox security add-ons I use (NoScript, Ghostery, uBlock) but I can buy elsewhere with all this. Based on the warnings they display, I think they know their check out procedure sucks but they do nothing. Hope they will put time and money to fix this because I would really like to avoid iTunes.