I've used Optimum exclusively until today. I thought their prices were outstanding. We recently upgraded our service to 1 gig. They came and installed a new modem. One week later, no increase in service but the installation fees arrived. We called to say our internet speed never increased they explained that our modem was bad. We had to bring it back and then they scheduled an appointment to upgrade the wires to our house because they said we wouldn't see an increase in service with out them. Twice, they never showed. Eventually, Optimum told us they wouldn't be able to increase our service, but kept charging us for the increased service. When we call, explaining we'd like to drop our service with them, we get hung up on.