**UPDATE**
So, it's been nearly 1.5 years since I installed the DDM kit into MY11 WRX and well, they're still working! I haven't had a single glitch/flicker during the entire time, and yes, I'm surprised as well. Being that I only paid >$50 for the kit, I figured I would've need to replace something but I haven't had to, yet. Hopefully, this thread is still helping too!