I bought tier 3 to try it out, and let me tell you... This is AMAZING!
Super easy, installed it on my main phone (yes i know they tell you to use a separate phone) But for my use, I want to be on the road and have my phone send sms as needed. I integrated it with my software and it works like MAGIC.

Just like that I upgraded to tier 5. I don't have more than 3 phones to use, but I can set this up for some clients.

I really hope this company succeeds as I love this piece of magic software.