Had a brisk 5 miles last night and found it to be great fun. Managed 12 mph average which is only a couple of mph slower than I would have expected on my hybrid. Plenty of gears for a loop with a 3% climb. Learning points were more care needed to avoid potholes due to the wheel size and the need to be aware of the increased rate of response (you can really chuck it about).
So really happy with the bike, it's not a Brompton when it comes to folding and weight but it was only half the price. Thoroughly recommended.