I don't have any idea about VPS service in Constant Hosting. But i would like to share my Experience about my Online gaming site which i hosted through VPS service using http://www.thewebpole.com/virtual-web-hosting/
. This offers me with good storage, bandwidth in both Windows and Linux Operating system. This VPS hosting service makes the site to access very fast, controls a lot of traffic and can able to load huge visitors at the same time with out any drawbacks.