Yes, unfortunately I am using the same modem, it gets very hot so I always use a usb cable with it(so it doesn't melt my laptop's port). Speed varies upto 100 kBps in just few inches. The software is worst I have ever seen. Takes too much time to get started, every time you start the software you have to manually select 'EVDO ONLY' or it goes back to 'Hybrid mode'. Takes too much resources, based on .net so if you have .net software development packages installed on your system then the modem's software won't work. There is another version of the software available on Teracom's website which will allow you to make calls, but is equally buggy. So, I never use the software unless have to make a call, use the dialer instead to connect for data.
Or, buy ZTE AC2766 or Sierra modems instead.
EDIT: Almost forgot until faced the issue today, if the network stops working for a while then the modem hangs. If you disconnect and try to open the software to conform signal, the system will hang. No option rather than rebooting.