I've just collected such a system this morning, a 180l DPS Pandora.

I've got one. Shoehorned the HW tank into the loft. Saves a lot of
space. Plumbing is more intricate - lots of safety pipes to dump
pressure outside etc,

The DPS Pandora is different from your system, though. Lower maximum flow
rates and won't work at all without electricity. However, it doesn't require
lots of safety pipes to dump pressure, which is the main reason I bought it.

Christian.