it's a superb service, until you want a revocation, then they try to extort $25/revocation out of you (even if you've been a long term paying customer)
this may be OK if you have only issued one cert, but if you've issued a few hundred (which is the main point of StartSSL: pay once and issue many), then you are SOL unless you can afford to plonk down thousands of dollars.
more here: https://www.techdirt.com/articles/20140409/11442426859/shame...
the CEO (Eddy Nigg) is similarly patronising over email too.