Just wanna share my Saga BLM 2010's experience.
Clocking 138k mileage now.. so far never had any major breakdown. I think the key is to never skip your service. But of course, having Proton cars is like russian roulette, u can have a non-problematic car or u will have a nightmare car. Now my issues with my car are as per below:
1) Main power window switch faulty. The main driver's power window switch is stuck and the passenger's side can only wind down but cannot wind up.
2) Mirror plastic thing to adjust up and down is broken. I dont know how the thing got broken!
3) My glove box already stucked for like more than a year. Not sure how to fix it. Do I need to replace the whole glove box or just the puller?
4) Key housing broken. Fell so many times. Lucky I got some dealer who sells the blank housing for cheap. (original).
All in all, besides all above issues, I think its a great car for its price. Not thinking of selling it at all.

1. change switch lo, around 100 bucks only if not mistaken
3. change the lever only. around rm30 if not mistaken