I think this is a good deal added the premiere service to my mother's ooma account and my own. It was $98.88 for a year. I chose free desk phones as the free gift (they claim it's a $89.99 value). I did have to pay an added $8.99 for shipping and also had to pay tax so my total was $115.84. If you don't want a free gift then you can save the shipping.
If you have Ooma without the premiere service then login to your account and see if you have the $20 off plus free gift offer... this deal ends May 31st.
I figured with the free desk phone, better caller ID, and the robocall blocking that it's a pretty good deal. I get a lot of junk calls and the junk call blocking available with the premiere service should be worth it.
It's my understanding that the desk phone wirelessly connects to your ooma Telo so you just need a power outlet for it.... no wired phone line hookup needed.