I switched to netcup for even cheaper private vps for personal noncritical hosting. I'd heard of netcup being less reliable but so far 4 months+ uptime and no problems. Europe region.
Hetzner has the better web interface and supposedly better uptime, but I've had no problems with either. Web interface not necessary at all either when using only ssh and paying directly.
I used netcup for 3 years straight for some self hosting and never noticed an outage. I was even tracking it with smokeping so if the box disappeared I would see it but all of the down time was mine when I rebooted for updates. I don't know how they do it but I found them rock solid.
I've been running my self-hosting stuff on Netcup for 5+ years and I don't remember any outages. There probably were some, but they were not significant enough for me to remember.
netcup is fine unless you have to deal with their support, which is nonexistent. Never had any uptime issues in the two years I've been using them, but friends had issues. Somewhat hit or miss I suppose.
Hetzner has the better web interface and supposedly better uptime, but I've had no problems with either. Web interface not necessary at all either when using only ssh and paying directly.