Yeah, used it to go from no riding for 8 weeks to a decent time in the 100 mile Cotswold Spring Classic. Did about 2 weeks of moderate stuff on the turbo before following the TCC plan.
It’s very similar to lots of other “build” period plans though – e.g. Joe Friel/Training Peaks ones. The TCC plan just misses out the concept of the base period but does point out the limitations of doing this – i.e. you can’t sustain the peak for more than 3 weeks or so, then you’ll need to have some time off. He doesn’t recommend following it more than twice a year either.
(Oh, powermeter helps, or you need to be able to judge intensity quite weel)