I've been using PositiveSSL. I am paying less than $10 a year for a basic cert, revocation is free.
I don't know anyone else who uses it, but there's nothing not to like so far, unless you are the sort who expects to pay nothing at all for your certs.
Today I was searching for PositiveSSL Certificate for my website.
I Googled and found many online store offers PositiveSSL Certificate, but there were major difference on price. I've found some stores offers PositiveSSL at $49/Year, $19.95/Year, $12/Year, $9/Year & $5.99/Year.
I want that PositiveSSL certificate for 5 Years. SO I've bought it from CheapSSLSEcurity at only $4.80/Year. I loved their service. The certificate was issued minute and its now live on my website.
This is the SSL cert provider used by Namecheap, I just got my first SSL cert signed here, the experience was smooth.
The longest delay in the whole process was from my own mailserver at the verifying site listed in the WHOIS record, which does greylisting (so it usually takes about 30 minutes to start exchanging mail with anyone you haven't received mail from before, since the server has to wait for them to retry...)
The whole process was smooth as butter, $9 later I have SSL support on my site.
I don't know anyone else who uses it, but there's nothing not to like so far, unless you are the sort who expects to pay nothing at all for your certs.