Introducing Cox Gigablast

I've been a GigaBlast user in the Chandler, AZ area since it first came to the East Valley. There are time when all is good and I'm getting 900+mbps. But overall the performance is very INCONSISTENT to the point that al of the sudden my streaming TV content will cut out and if I check the bandwidth at the back of the Fiber equipment I'm only getting 2-10mbps. Then suddenly it will jump back to full bandwidth later. Has anyone else seen this same problem? Is there an internet speed tool available that I can set up to run at a schedule on a computer that will log the results so I can graph the times I'm losing the bandwidth and then try to determine if that coincides with some activity or at a certain time each day? I swear the cable based, modem service was more consistent than the fiber is now. I've called in about this before and they always just say "well, things look great on my side!" Please help. -Chip Linthicum -Chandler, AZ