Purchased a full upper and lower to replace my 1989 Alpha 1 drive. From the initial call to their sales staff, to the first run on the lake, SEI has been a great experience. The delivery from Florida to South Carolina was 3 days and the packaging was impressive. The drive was very easy to assemble and install. I'm at around 20 hours now and have made a few WOT runs and love the 1.81 ratio compared to the OEM 1.84. Drive is very smooth, quiet and has performed very well. At this price point for a full outdrive unit and a 3 year warranty, I know I made a great decision to go with SEI.