The display is a bit awkward and obscures the line of sight. This will improve a lot if you switch to Google Glass's display system. The display system of Google Glass uses himax's hx7309. Link: http://www.himax.com.tw/en/products/microdisplay-products/color-sequential-lcos/hx7309/
They offered a sample of $100 a piece. I think this will be a very practical display system. If you are interested, I can also help in some aspects.