After much hesitation, I have joined the onsip community and also a small client are using their services. I signed up in late November 2012 and deposited a small amount of money for PSTN credits. At the time, onsip had about 5 different service plans to choose from, but I remained on the al la carte. Since mid-January, onsip did something that I’ve been so happy with: made the pricing much more easy to understand.

There’s now two plans: pay as you go at $50 & per seat unlimited starting at 5 users.

Anyway, you can see I’m passionate about onsip so I wrote a short review here:
http://pbxinaflash.com/community/index.php?threads/onsip-com-is-a-great-platform.15649/