We have 2 fronts (EF-08) and 2 rears (ET-01) in stock at the moment. Prices are £36 rear, £27 front. The front seems to be the weapon of choice for all trail bikes in Devon and Cornwall but the ET-01 rears are personal preference. I use them on my 400cc CCM and love them but I'm aware that they go 'squirrelly' at 60mph on the road and it's easy to tear the knobs off if you are a bit too eager with the throttle. However, the level of grip is astounding as the tyre is a radial and not a cross-ply.
If you bike is a 250cc or less then this tyre is for you. Anything larger than a 250 you ned to be aware of how fast you're snapping the throttle open.
Once the MT43's go up to £46 then the Mitas ET-01 will become more popular I think.