L1 has 40 degree adjustable angle which is good for ergonomics, and if you have searched similar products on the market, you will find that most of them only has 0 to 35 degree adjustable angle. Furthermore, within 40 degree adjustable angle, it create perfect viewing angle for the monitor, if the adjust angle is over 40, the monitor will not easy to be watched and the laptop may not be held steadily, therefor 40 degree adjustable angle might fit most users??needs