Your money is correct And this is OBM too - but yeah, I did both tyres in about 10 mins watching the TV. Fresh Stanley blade and a little bowl of soapy water. Dip the blade in each time and it flies through, it works so well. Minimal hassle. I did my tyre on Adam's recommendation - fully wasn't into the idea of it, but trusted in Adam's infinite wisdom. It worked really well - it actually sounds grippier when you pedal hard. It makes a pretty much 'brrm brrm' sound when you do two half-pedals one after the other. It grips frighteningly well on mossy rocks, and owns street too. I'd definitely recommend doing it. Just when you're sitting there on TF, watching TV, wherever. Just get a new blade, soapy water, bam. Do it!