They seem fine from the reviews I've read. Excellent pricing and it's great to host behind a DoS provider.
If you're interested though, in my opinion better options exist for hosting your web site. My preferred way to host a DoS-protected website is hosting with a cheap OpenVZ server. There are thousands of providers and they start at comparable prices to TrentaHost. You can run any web server you like and so much more with an OpenVZ server, in fact they are x86 platforms if you weren't aware. I use Nginx on a GNU/Linux platform and setup a proxy so I can use a Java web server through the Nginx service. For DoS protection I use Cloudflare which also gives me extra features like fast DNS propagation and flexible SSL.
Regardless, I hope to see you with a product that satisfies your needs. If you want to just host a website without knowledge of doing so with a root platform then TrentaHost and similar web hosting services seem ideal.
Either way I'd recommend using Cloudflare for your website. Its features are amazing and it's easy to setup. I can help you with any of the aforementioned.
Good luck on your RSPS! :-)