I've just signed up for a 5 year certificate using https://www.gogetssl.com/comodo-ssl-certificates/comodo-posi... for $18 - I know there's annual free ones, but at that price is it worth the hassle of renewing?

Never used them before, but they're just a Comodo reseller, and they take Paypal, so there seemed little that could go wrong.

Has so far gone smoothly, certificate installed, passes the SSL test google mention, https://www.ssllabs.com/ssltest/ so it all seems good