I have personally used the Canada Post payment for Kraken back when I was still new to bitcoin. My Kraken account was a KYC account and I have not use it for a year or two. However, when I did use the Canada Post deposit back then, it was fast and simple. You just tell the clerk that you want to pay whatever amount (the limit was $500CAD for Kraken) to your QR code, you let them scan the code and they take your money. The balance shows up in your account within minutes of paying Canada Post. The only draw back is the inconvenience of having to go to a Canada Post to pay in person, but that is an inconvenience I am willing to take.

I will be trying this out later today to see if it's the same experience with Bull Bitcoin. Excited to be able to stack non-KYC sats at market price with good liquidity!