Best Internet Phone (VoIP) Services?

Seen an Ooma commercial this morning while watching "Trucks" on Spike TV. This is the first time I have ever seen them advertise. The commercial was pretty cheesy and lame.

Calling that ad cheesy and lame is being very kind and gracious. :D The ad would certainly not entice me to buy or even look at their product. Maybe they use the same ad agency as MajicJack?