No experience whatsoever (although I've fitted a B&Q "Airforce" split system climate control unit(s) myself, with some hassle but considerable success, at £400* + £15 bracket and £15 core bit).
The thing that worried me about the digitemp whilst looking at the glossies is that it is a single unit, and yes, looking at the detailed spec, "Noise levels as low as 37dba" - 37dba is actually quite noisy!, if you want your conservatory to be a peaceful haven then forget it! Of course, the one advantage of the unit (over a split system) is that its suitable for a dwarf wall (a likely necessity for a conservatory).
Horses for courses, but I'd suggest you understand the noise level from this.
(My reference source: home-cinema projector - 24dba is bearable - hardly noticable, 27dba (high-fan mode) is unacceptable for me for watching a film)
*Damn, just noticed its on sale now for £279, an absolute bargain.
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