I'm not a tech savvy person (at least around here) but I used Gandi to purchase my certificate. I paid 12 bucks and it was extremely easy to implement it. To give you an idea, I didn't even know how to enable access to my site without entering "www." in front of my URL. But getting the certificate and implementing it was so easy that I was actually surprised once my SSL was active. I was expecting to run into a couple of problems as I usually do when I deal with these sort of thing.
I'm using SSL for my personal website and it's not a commercial website.
I've got a couple at Gandi too, and I was pleased at how easy it was to set up. I used the free first year (included with a domain name purchase) but then went looking for the cheapest I could find. https://cheapsslsecurity.com/ sold me a simple domain validated cert for $19.96/5 years. That's the lowest I've seen but it looks like they raised their prices slightly since then.
Honestly, I don't mind that Gandi isn't offering the cheapest option out there. My domain and my host are from Gandi, so it was a no brainer for me to get my certificate from Gandi. I didn't even check the alternatives. If it was a hefty price, say, like $50/yr instead of $12, I'd have probably looked for other alternatives but I'm happy with them so far and I like to reward companies that serves me well as a customer.
I'm using SSL for my personal website and it's not a commercial website.