The reviews on the Rotak 40C, I think are actually for the 40, particularly as one reviewer quite rightly notes that you can pick one of these up from Homebase for £119.00 and Homebase doesn't stock the 40C!!
I have bought one of these for my Medium to Small garden after my Flymo burnt out. I have to say that I have been missing out. The Flymo was hard work, hacked the grass, rather than cut it and wasn't even very good on my steep front lawn! This BOSCH blows it out of the water. Its powerful, easy and produces an excellent cut, even across steep ground. You can easily adjust the cut height and the grass collector really compacts the cuttings, meaning I can do the whole lawn without emptying. I was going to buy a Petrol Mower this time, but the Bosch is so light and relatively maintenance free, I don't think you'll find much to justify purchasing one of the competition.
One of the best bits of kit I have bought for exceeding my expectations. Great value for money!