i have SMX+ and im a eu 45 in them, i bought a set of tech R's thinking they'll be the same size, they are slightly bigger, so im considering getting rid of my tech r's for the next size down.
I use smx+ used my bros R's and they are superb. Amazing fit, great quality and the airflow is so good I was checking that they weren't undone on the sighting lap. They also crashed well - oops
I've been using my SuperTech R's for over 2 years now for road and track. I've heard that the zips can give trouble, but mine are solid, fault free and comfy. I reckon I've had my money's worth and would buy another pair.
Great pair of boots, extremely comfortable. I have wide feet and they dont ache at all and feel spacious. In fact I have done ward rounds in hospital in them and i could carry on for hours more. On the bike they give great feel and the inner boot is great. I have quite big calves and when tucking the leathers inside the boot, it could get a bit difficult doing up the outer zip and then the outer retaining strap.
I've had a pair for a few years now, really good boots, extremely comfy even doing touring miles. Quite waterproof too, a full day in the wet at Donington and my feet stayed dry.