I have never ridden the Kreitlers but from all of the reviews they are awesome (as far as rollers go). I just have a cheap set of rollers and I absolutely hate using them. There is nothing wrong with the rollers, I just hate rollers. Personally, I can't justify buying expensive rollers, which is rare since generally I always buy the best that I can afford.
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I may be fat but I'm slow enough to make up for it.