This question is looking for your SDSL experience under the same scenario – points awarded for success or failure.
We have noticed disturbing behavior with the Netopia R7100c router on our SDSL 784k link from DSL.net:
When downloading a largefile from a high performance Internet site all other users have no Internet connection. We tested a second different request on the same pc, and with other pcs on different subnets. The Netopia does not forward the connection to the backup connection. Pinging to the immediate other side of the DSL link yields typical response time of 20 seconds to 1 minute, with occasional times exceeding 3 minutes.
This problem could create many irate Internet users and kill VPN connections.
(continued – read all, but reply here for points)