I am a total newcomer to this forum and also to this way of watching tv.
My stb is a Vu+Duo and I find it very easy to understand most of the time once I have worked out the various names for what the functions are.
I have installed a 1TB HDD for recording with no problems at all.
A great plus is the fact there is LOTS of help for the Vu+ range wherever you look (yes, I need it....lol.!)
I am very happy with my system and can recommend it, unless somebody knows a better one.......
Good Luck.!