Overall I have been very happy with my ooma system. It is a very good value.
Multi-ring was one of the primary reasons I decided to make the purchase.
I'm frequently away from my desk (and out of cordless phone range) and have set up my system to ring my cell phone when a call to my ooma # comes in.
I'm a little disappointed in the implementation, for two reasons:
1) I am prompted to press "1" to accept the call. This is annoying for a few reasons, but the main reason is that I use a bluetooth headset, and can't easily press "1".
2) There should be a configurable # of rings delay before ringing the alternate phone number.
#1 is the big issue. It would be nice to hear if there are plans to eliminate the "dial 1 to accept" prompt. It seems like a hack.
-Zak