Its very important to choose a coach that you trust, and one that you can communicate with. I would recommend avoiding any training plans that don't involve communication with an actual person. The main benefit of coaching is talking to the coach, who has lots of experience. You can find links to hundreds of different kinds of training plans on this site for free, but if you have the resources you are much better off with an actual coach. You should definitely talk with whoever you are going to hire before you hire them.
Any particular reason that you are interested in CTS, other than their notoriety? I only ask because Michele Ferrari has a website where he offers similar services (
www.53X12.com ). Like Floyd Landis said, which one would you listen to? Well maybe you shouldn't, but I think it would be interesting to hear if anyone actually uses Ferrari's program, I bet its really expensive (or maybe that is just the EPO he gives you).
Also, for what its worth, I'm a type 1 diabetic. I'm very new to cycling, but I can offer a few pieces of information. Make sure not to drop too low while you are riding, since you might get in a horrible accident. This happened to me while driving 3 years ago, and I can only imagine that it would be more likely when you are engaged in vigorous exercise. Also, everyone is different, but I notice that while my blood glucose drops low during hard workouts, after these workouts it sometimes mysteriously spikes really high, so you should watch for that.
If you manage to figure out a good way to mount a glucometer to your bike, it would be cool if you could tell me, and if you use an insulin pump you should also tell me how you wear it while cycling (especially if you use bib shorts, since I've been wondering about that for a while).
Good Luck.