I had just bought a 2008 BMW E92 and was looking to upgrade the stock angel eyes to LED. I had heard a lot of horror stories about Umnitza so I was hesitant at first, but then decided to give them a shot due to the warranty they offer. Despite an initial problem, these guys really came through and stood behind their work. Matt and Tim are great guys. Matt helped trouble shoot the problem and even involved one of their certified BMW mechanics from Napa who fixed it at no cost to me. They even upgraded me to the top of the line LED for no additional charge just for my trouble.
I have no hesitation in recommending Umnitza to anyone looking to customise their car. I know I will be going back to them soon when I upgrade my fog lamps.