I use the device with DSL and was quite happy, but the other day time, I use the device as a router on my Cable Modem and the key features are not available:
1 - No Firewall 2 - DHCP Server can not be configured 3 - No Jungendschutz
Why this is so is my Rätzel, the problems are but on their website.
Conclusion: Great for ADSL (5 Stars) flop as a router via existing Internet connection (1 star).