I have had a stout faucet for about a year and I am ordering a perlick to replace it. When it is working the way it should, it is nice, but not every beer takes to the stout faucet as well as you imagine it, IMO. Also, tanks of beergas are WAY more expensive than CO2 and take up extra room in the keezer. Of course you need a nitrogen regulator too. [edit: you may not need one, see KB's post below] I get the proper cascading when I'm serving at about 25-30psi, and once the pressure falls below that I get too much foam, but the tank is far from being empty. More trouble than it is worth if you ask me, but lots of people will say they enjoy it, and that's cool too. Hopefully when I get rid of mine it will go to a good home.
Once I am back from holiday travels I will make a post in the classifieds forum. Faucet ($75 new) + N2 regulator ($60 new) for 100 shipped.