[Subby]

The CGMS is not so common to be covered by insurance/other plans to be affordable (hopefully that's changing), so it's important you work out if it's affordable first.

As for the pump, I echo sentiments here that a pump could be great, if you are prepared to "work with" your pump (it is not automatic, it just gives you a whole lot of ways to deliver yor insulin more effectively).

To answer your question does it improve wildly unpredictable BG's. Chances are it will make a substantial difference if you spend some time and effort to set it up correctly (meaning, some guessing, trial and error, to get the right settings for your body). For a start, you are currently on a long acting shot for your basal needs (between meals, overnight)? Your body probably does not have an entirely "flat" basal requrement through the day. In other words long acting can cause ups and downs because it is one rate through the day.

On the pump you can change that rate every half hour, if you wish. Most people find that at least 3 or 4 different rates through the day avoids problems that they could not get away from with long acting insulin. There is a straightforward way to work out good basal rates that will help, called basal testing.

Another thing about the pump to really help avoid lows and highs, is that you use carb counting to determine any dose any time. Do you know what I mean by carb counting? And of course it is easy to take many small doses through the day to cater for exactly what you eat, rather than a big flat mealtime dose. You can also easily take a correction dose if you are say very high. This is based on a "sensitivity factor" you put in that works for you (it might be, 1.2 units to come down 1 mmol/l or 18 mg/dl) and it can work how big an insulin dose is needed to get you back to normal levels again, you just give it your lcurrent level, it does the rest.

I know all this might sound confusing. They are examples of how a pump practically lets you control your BG better thank injections often turn out. It does bring it's own set of pains and trials and tribulations, but it's true that many find it really helps especially to irom out troublesome BG's like yours. Ask any questions you want, we'll do our best to answer.