I looked over the plan and I don't think it offers anything special.
No911 service
No included outbound minutes.
Inbound calling is free
Voicemail
Free fax number for 6 months.
$2.50 per month.
Odd that such a limited offer made it to this level of recommendation by Obihai.
I'm still waiting for the May 15th deadline for my 2nd line so I'm still shopping but whatever Onesuite's selling I ain't buying. I was a long time Onesuite prepaid customer until very recently. When I had a problem I discovered that Onesuite's customer service is painfully slow, clueless and dreadful. They are polite though. Details upon request. Becoming a Onesuite customer is not a mistake that I'm going to make twice. Stay away.
I've used OneSuite for years (10+) to make international phone calls, or calls from work when I need to charge to my personal account. Great company. I've never used them in this manner though. Plus, rates are higher than many VOIP providers, so I rarely make calls through them anymore.