I recently installed the Retro solutions 55W digital kit in my low beam. the only issue I had was my fault: On the passenger side, I plugged the harness from the battery (via relay) into the ballast the wrong way. I didn't notice you could plug it in either way for polarity. Once I corrected that, they have been Fantastic!
2. You do NOT need to remove your fender liner to get to the white retention clip for the back of the headlight, there is a small access port in the fender liner.
3. I started out not using the Auto lights but found that to be a PITA since I'm so used to having Auto lights. Recently, I just turned the Auto light back on and have had no issues so far. BUT- I did disable the area lighting function in EVIC so that they don't light when I unlock the truck before it's running.
4. Some people will say you don't need to remove the grill to do this job, I say it's easy enough to do so and helps to avoid scratches and gives you easy access to run the wire harness cleanly. I just zip tied the harness to an existing harness that runs across the support.
5. I installed the ballasts right above the headlight housings on that black support that has a nice flat surface using double sided tape and then zip tied them for assurance.
6. I ordered the 5000K bulbs (You do not need the caps in the low beams, they're already shrouded. the 5000K bulb is NOT the same color as a stock light. It is whiter with a hint of blue. I love the color and was told that 5000K puts out the most light. Its a personal choice, but that's definitely my recommendation.
7. Im not going with projectors any time soon, but I will say the HIDs seem to throw alot more scattered light up and to the sides. I have adjusted my lights 3 times and believe I have them well adjusted at this time. - Nobody has flashed me. Maybe it's just so much light that I think it's going everywhere but the main focus is very nice.