We're considering getting a "fixed on the wall" water heater for
instant hot water to use for making coffee and such.

A quick search turns up this:-

http://www.discount-electrical.co.uk...res-2-2kw-240v

which would appear to fulfil our fairly basic requirements and is a
whole lot cheaper than anything else I can find, all the other more
'commercial' devices seem to be well over £200.

We sort of want to try the idea out before spending *lots* of money so
this might be a way to do it. Does anyone have any
experience/knowledge of this device?

--
Chris Green