Has anyone ever had an online physical fitness trainer? Did you find it valuable or not worth the cost?

While I have found some of the online training techniques to be useful, there will be a few things that they can't provide:

A spot when you're digging to push that last rep.
Real time feedback about your form.
Those "tough love" words of motivation when you're not preforming to your potential.

I wouldn't either. From is very important in not getting injuries.

I have had friends use them for triathlon training and they were all much better from it.