They have been in business for several years,so at least the guarantee is worth something!
You will see the odd adverse comment about them in these forums but as a volume seller that is to be expected.
I am on my third system from them,they are not perfect,who is,but the few problems that I have had were corrected with no quibble.
If after sales service is important to you,give them a go!
No, I don't work for them but I have kept some of them in jobs over the years!!