I haven't used Cyclocore, but I can't imagine a situation where Trainerroad doesn't far exceed Cyclocore.

Probably better than the other ones as well, mainly because you're training with power, with appropriate levels tailored to your ability.

These Trainerroad plans are legit:http://www.trainerroad.com/cycling/plans

At first I thought the Int Build 1 would be too easy on volume (<6 hrs per week) but turns out that it's pretty good for the offseason. The quality absolutely makes up for any lack of volume in this plan. During non-winter, I normally ride 70+mpw with 4000ft of climbing every Sat, but I have to admit that the TR 90-120 minute workouts are probably just as good in terms of training load. Riding at steady state subthreshold for 60 total minutes might not sound that hard, but when you actually do it, you have to focus. Crank it up to threshold and it's a real buttkicker.

I honestly didn't expect to actually follow a TR plan, but when you get the great metrics, and you see all the hard work you've put in (it stores all your workouts and PRs) its very motivating to keep up the work. Especially since you get objective TSS scores for training load as well as intensity - takes the guesswork out of ramping up your workouts.

It's the best $10/month I've spent on cycling, bar none. If you've never trained with power before, you're in for a real treat. If you have trained with power, I think you'll still be surprised with how good the workout structure is - I've never had such time efficient cycling training, ever.