I've worked professionally as an installer for 12-years. For me personally the MECP is a waste of time. The MECP is a one tracked certification, that leaves your career choice very limited. Unless you wanna be an installer the rest of you life, I would suggest that focus your time and energy into something more productive and personally fulfilling.
Don't missunderstand, I've enjoyed the past 12 years, but its time to move on. And I practice what I preach. I currently have an Associates Degree in Electronics and Saturday I will graduate and have a Bachelors Degree in Mathematics.
The MECP, I didnt bother. If its important to you, then go for it.