i'm using a seedbox from OneProvider since 2 months and i want to give you my opinion on this provider.
So, it's basicaly a cheap dedibox server from online with 1Gbps bandwidth, it's a dedicated server(you're the only one on it) so you have to install everything yourself but it's quite easy to do so, there's plenty of tutorials on internet and most trackers
I have a 2TB HDD and an i3 530 2.93 Ghz as CPU, 4 GB and i only pay 20 euros/month.
I didn't have any problem with it so far, it's a solid seedbox, you can add +500 GB torrents for instance, it won't crash or anything
Here you can select your location and check if seedboxes are available : http://oneprovider.com/dedicated-servers-locations
Tip : Check out the website everyday in case the one you want is sold out.
Support - As i said earlier, i didn't have any issue so far so i can't rate it.
Overall rating 10/10
This is the best seedbox i've used and i'll stick with this provider <3