I love my digisight. For comparison, i previously owned a D grade gen3 archer and hated it, very heavy, cheaply made with the rubber eyecaps falling off, finicky on off switches for both the unit and laser, the unit power switch actually snapped off in my hand and i have heard this has happened to others!
I can't fault the digisight, the only initial downside is the x4 mag. I have the add on lense on mine along with the L808 laser and it is superb, clarity is great over a good few 100's of yards. The picture is much better than the crappy archer i had.