Neil, if you want to pay for me to have a PM on every bike, and to replace the bikes when they get nicked cos I've left the locked up with a £500 PM, he's very free. Oh, and since lots of my riding is also commuting, so I suspect leaving my Power2Max to get banged up against the other bikes in the train will decalibrate it really fast, so it'll give junk data anyway. It really is a bitch, having to work for a living. If only someone would pay me to ride my bike all day, then I could use a PM on every ride, record all my metrics and work out meaningful values of TSS, CTL and all of Andrew Coggan's other markers.
Would I buy one again? Questionable. It has its uses but for best use, you need to be doing all your exercise on a PM-equipped bike. That's obviously fine if most or all of your cycling is for sport, but if a fair whack of it is for utility - like it is for me - then you lose the performance tracking benefits, so a PM is less good value. Also, realistically I'm the sort of hobbyist who knows exactly what I could do to improve: ride my bike more, sleep more, give up the booze and generally have less fun outside cycling. You don't need an electronic gadget to tell you that.
When it gets to race day itself, I still think HR is more useful - and Rob is a good example of how much you can improve when you set your mind to it, without any of the latest fancy gadgets.