The HG216D is essentially a low-end 22" screen - it doesn't have a DVI port and it suffers a little backlight bleed like my other Hanns G screen.
In normal use I haven't had any problems with it though - mine doesn't have any dead pixels or suffer from ghosting - and for an analogue connection the picture is surprisingly clean.
Mind you I have had one scare with the picture not displaying on the screen fully - auto-adjust fixed it though - after I'd spent five minutes in the OSD scratching my head.
Oddly for a low-end TFT it has a HDMI port. However, it doesn't have aspect ratio options so connecting anything like a PS3 or freeview box via HDMI gets you a stretched image since this is a 16:10 screen.
However, it does support sound via the HDMI in - this of course comes out the built-in speakers which are pretty poor and unfortunately there is no way to line out the sound or use it with headphones. However, if you're using a PS3 you can set multi-out and use the SCART L/R via an AMP.
In conclusion not a bad screen but if you can spend a little more I'd advise going for a better-known household brand name like Phillips or Samsung - you'll probably get a much better monitor.