Right, well I'm pleased to report that I collected my M20 yesterday.
First impressions? It looks cracking, just like a road bike should. Weighs in at 12 kg on the suitcase scales. Rides like a road bike too. The balance between the down-tube battery and rear hub motor is spot on and handling is, therefore, excellent.
Only one short ride so far as the effective air temperature was 0 degrees! I took in a couple of savage hills and needed to up the assist level above the lowest. I need to regain some lost fitness!
I'll post more when I've given it a proper go, but I have to find a spare day!
If you like the Orbea, do also look at Ribble's new offering. It's essentially the same bike on a Ribble frame. About £500 cheaper for a similar spec. I prefer the more traditional look of the Orbea, but £500 is £500!