Payment process is fine, but credit card fees are excessive
The payment process appears to be secure and fairly straightforward. My deduction of two stars is based on the excessive "service fees" they charge with any payment by credit card. Whether paying in CAD or USD, there was a nearly 4% markup. Fortunately, it's possible to avoid this by paying directly from a bank account by electronic funds transfer, but I have never seen credit card fees this high. Given those fees, it's much better to pay directly from your bank account.