Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Hella HLA-H83155131 HB1 9004 12V 100/80W Off Road Use

I was really excited to get these installed and check them out. My excitement was short lived. I installed the new bulbs ( being careful not to touch bulb ) and the new high temp plugs that I also ordered. Installation was a snap and all tested well... low beams and high. When I next had the opportunity to drive in darkness, I turned on the headlights and the driver side unit failed instantly. I got to work and checked that I indeed had no low or high beam on drivers side and when I turned headlights off... the passenger side bulb exploded and now I have debris in the housing. Needless to say, I am not at all impressed and more than a little annoyed. I certainly expected better of German manufacture. These bulbs are EXTREMELY HOT burning, so don't use them in a housing with a plastic lens or it will probably melt the lens. I will never buy this brand of bulb again. I'll stick with OSRAM Sylvania, GE, or Philips.