The two-way Sat is great IF you can't get ANY other broadband. Upload speeds are the same as a 56K modem, which isn't a problem for web surfing, etc., but sucks if you put a lot of files up, send a lot of large emails, etc. Also, Sat is bad for online gammers (latency). I got rid of the ISDN and went wth the Sat... no phone lines cost; 49 /mth.
I'm waiting on the a local company to get their wireless going (supposed to be this month), 10Mbps up and down, low pings :) THAT is fast.