My experience has been that if the dish is properly installed in the first place there should be only very rare instances where it needs to be realigned.
Also, my dish equipment has been very reliable (I have a 722K and 3 211's) so I have only used Dishes replacement services 2 times in 9 years and I therefore do not subscribe to their Protection Plan.
In the two instances where I used their service, I made the determination that the receiver needed to be replaced by doing troubleshooting before calling the first time to subscribe to the Protection Plan then called back or used online chat to get the receiver replaced (both were hard drive failures on the dual tuner DVR).
These instances were both before Dish initiated the $25 charge for cancelling the Protection Plan, but even with that dissuasion, I still do not subscribe because pro-rated the plan plus the cancellation penalty usually comes to less than $30 per instance and that is 5 months of the Plan.
If you develop chronic problems with your system, by all means subscribe and use the heck out of the plan, but if your experience is anywhere near mine, I have saved hundreds of dollars by not having it and knowing I can get it if needed and even by cancelling immediately after the problem is corrected, I still save a lot of money off what someone would pay for contimuous subscription to the Protection Plan.