It seems like they use really cheap HDDs. I'm a customer for a few years and in every server since then, one harddrive died. It's not really a big deal when you're using RAID.
They use regular consumer grade HDDs on the cheaper servers, and enterprise grade on the slightly more expensive ones. For instance, their EX6 servers have 2x 3TB of high quality hard drives (€70/month) and their EX5 servers have 2x1.5TB consumer grade hard drives (€56/month).
Same here, been there a few years now and recently had 4 drives fail in 24 hours! But, as usual, fast and professional support.
Just make sure you don't have anyone on the server (client, etc) running SSH attacks on their core routers or UDP floods, because that becomes a nightmare!
