No personal experience of them but they seem to be like many other generic "modular cold room" suppliers on the internet. The panels are much of a muchness and tend to be cam-lock and easy to build so it'll all be down to the quality of the monobloc unit.
Might be worth finding a local commercial fridge company - they'd probably be similar price and you'd have local back up / support. Local estate / butchers / farm shop / hunt kennels all worth an ask for who they use.
The tricky part is finding someone with a good rail system if you want to hang reds easily - otherwise quite a few cheap options out there (and lots of threads on here about rails so I won't derail this one!).