I have left off writing this for several months as I hate those user reviews that tell you that the new thing that has just been unwrapped looks cool when what you want to know is whether the thing does the job and stands up to day to day use.
So what of Mr McHollan and his biomechanics? Unequivocal approval in this quarter. I never thought it would be possible to achieve so much by exerting 20 per cent effort for perhaps 20 minutes a day. If only such a reward to effort ratio were achievable in other areas of life!