When it's working it works well.. When it's not working it's a disaster - i have had problems - 5 times in the past month. They off load the blame to the the carriers, and have no redundancy as backup. They claim they have a system which monitors and updates uptime and down time - however i was down and i checked the system, which said it was up.. i called the help line, to be advised 'we rely on our customers to let us know of issues' All in all it's cheap - so if cheap is what you want then expect that. we utalize a second carrier as a backup. The major concern is when i first started using sms broadcast, the outages were very rare.. now they are weekly - sometimes twice a week.