I use both trainer and rollers during the winter months. Usually Dec. thru Feb. The two best racing seasons I ever had I used these tools in earnest and came out fresh in the spring. Yes, they can be boring but what I did was watch some great cycling movies or watch two half hour programs on tv. Workout vids just didn't do it for me. I would hammer threw the commercials and recover during the program. Made for a decent workout. HINT: get a fan to blow on you to keep you cool, you will need it! It takes discipline to get good results from this type of training. I suggest a magnetic type trainer.
Cheers,
Rick in Tennessee