I've got one!
When I first received it, there were issues with the setup- gears not indexed properly and cables not routed correctly, there were also scratches on the rims and handlebars. Evans didn't offer me anything apart from getting the gears and cable routing sorted.
Anyway, the bike itself is fantastic. I've never had a CX bike but I've had a race HT and various road bikes. I would say that it's a brilliant road bike- little draggy with the stock tyres but great clearance for guards, plus lots of rack options. Feels much better than my winter road bike (which it replaced). Happily done 50+ miles in a day.
Discs took a while to bed in but are lovely in winter- quieter than rim brakes and more consistent/reliable. Full carbon fork feels very stiff compared to others I've had in the past.
Not given it proper abuse offroad yet but seems to do the trick on footpaths, etc. I can't wait for summer!
Should add, when I bought it I got £140 worth of free kit- so got shoes, shorts, top and other bits.
It feels like the wheels may be fairly weighty, potential for future upgrade there but the rest of the kit is lovely. Still not convinced by the frog leg brake leavers, they may have to go. Best value CX bike out there in my opinion.
Edit: I'm 5'8'' with the same inseam and find the 54cm size perfect with 10mm spacers below the stem and about 12-17cm of post showing.