[asterisk-biz] experiences with teliax, voipjet or junction networks?

[asterisk-biz at sasami.anime.net]

We are looking for SIP trunks for our * pbx for our business. Being able 
to port our numbers is an absolute requirement. teliax can do it, but I am 
unsure of the others.

Anyone have experiences (good, bad) with the above mentioned providers to 
share? Eg reliability, quality, etc.

-Dan