I have run HIDs in all my cars for at least the last 10 years. I have alot of experience with retrofits and projector installs, and various brands. I have had issues with every one of my morimoto based installs. I have dealt with failed bulbs, failed relays, failed ignitors. The plus with buying from the retrofit source is their warranty policy is solid. They have replaced everything without issue. But I got tired of replacing stuff every few months. Ive tried the cheapest crap from DDM tuning all the way to OEM. If you want the most reliable setup OEM ballasts with Philips or Osram bulbs in a proper projector housing is the only way to go.
It may be possible that I have had 10 years of bad luck, or 10 years of poor installs, but if you read complaints about morimoto products on hidplanet, you will see im not the only one that has had issues.
Either way, LEDs are just easier, when something goes wrong, you only have to trouble shoot 2 components instead of 6 or 7.