That's a good deal. I'm in the UK and I've never had anything like that. I currently have ten paid sick days per year and after that it is Statutory Sick Pay (SSP, £96.35 pe week) for an additional 26 weeks. SSP is better than nothing but it's not great.

Looking back, all of me previous jobs have offered 10 days sick pay and I've always assumed it is a de-facto standard over here.