Ive not seen the pod directly, but someone who uses it said it was very similar to the Dexcom cgm sensor with the G5 transmitter on top. I use Dexcom and its not at all uncomfortable.
Most of the pumps in general are a tiny bit big for young children to lug about. If I couldnt put the Spirit Combo or the Vibe in my bra, I would not have chosen them. The pods pdm is sonething like the size of a Vibe pump and about the same weight. The new pdm when it is launched is said to be smaller.
The Vibe pump is fairly straightforward to use with just 12 basal rate time slots whereas the Spirit has 24 time slots and each slot has to be adjusted correctly to achieve the best bg basal rate. The Vibe weighs more than the Spirit due to the design of the pump and the plastic used for the casing. The Vibe shines because of Dexcom cgm whereas the Spirit Combo shines because of the Expert meter being able to work as a bluetooth connection between the pump and the screen display and the pump access buttons can easily be used all from the meter so the pump can more or less be hidden. The Vibe has an lcd display which is really hard to see in bright daylight unless some shade is used even with the contrast set to be high, its still hard. I now tend to keep the Vibe in a side pocket of a black handbag so that I can see the screen display inside my handbag giving the shade when its sunny.
When your daughter does get the pump, then you or your wife will need to constantly check on her for a few weeks to make sure that bg levels are not going too high or too low. The school will also need to know how to use the pump in case something malfunctions etc so if your wife works, then there's a good possibility that she will need to go to the school at times so will wife's employer be ok with that or will it be work or P45.
Lots for you to think about