It uses accelerometers to measure cadence in a sport where training is (or at least should be) guided by cadence.
It does do some things that SRM doesn't (L/R power readings, user replaceable battery, shorter crank lengths) but it's only $200 less than the gold standard SRM.
If it came in at $1,000 or less...maybe. But, not for only $200 less than SRM. Just get SRM.