So my wife is a type 1ner. She recently got a pump that also reads her transmitter and it will change the amount of insulin being delivered based on what the transmitter is saying. It isn't perfect she can overwhelm it if she eats a ton of carbs, but honestly it's gone from her pump/phone yelling at her 7-8 times a day about being high or low to maybe once a day or once every other day.
The biggest thing it has also done is regulate her blood sugar at night so we don't wake up anymore with the pump screaming at her that she needs to start shoving fruit snacks down her maw.
I have a family member on a similar system. You might/probably already know this, but I'll put it out there anyway in case I'm wrong.
The thing to watch out for is that if the CGM was previously alerting about frequent nighttime lows, there should probably be some basal dose adjustment made in the pump. The pump can cover incorrect basal dosages for a good range with its automatic adjustments, but it's better to periodically look at the numbers and see if it's regularly backing off the basal dose because it's too high.
The biggest thing it has also done is regulate her blood sugar at night so we don't wake up anymore with the pump screaming at her that she needs to start shoving fruit snacks down her maw.