Joined on 04/30/12
SOLID

Pros: Great range and speed. Easy to setup and do the firmware upgrade.
Cons: none yet
SUCKS

Pros: CHEAP
Cons: DONT BUY THESE. The ribbon cable for the front screen button does go back into place because the screw holes are NOT lined up properly. WASTE OF TIME AND MONEY
SOLID BACKUP DEVICE

Pros: We use these drives on all of our five servers. Easy to setup & very reliable! The drive showed up in new condition, scratches or dents. The metal case is very durable and looks great. The speeds are amazing when using USB 3.0 I have never had to use the customer service!
Cons: None
Works Great

Pros: Easy to setup if you are used to the ZyEXL firewalls. Throughput is very fast, firmware upgrade was seamless, seems like unlimited rules and port forwards available (currently have over 50 rules/fwds). A great piece of hardware for our small-medium sized business.
Cons: None yet
Flawless

Pros: Speed, ease of setup, price.
Cons: none yet
Overall Review: Started purchasing these units instead of the TM-88IV. Only thing I see that's different is the 88iv has the security power plug and the 20 has a std PC type plug. Speed and performance are identical.
ROCK SOLID

Pros: Very easy to setup, rock solid. Have had online now for about 6 months. No problems to report
Cons: NONE!