We bought the smallest version some years back. The idea was to use it to replace our rice cooker with something multi-purpose.

The rice cooking function takes 12 minutes at pressure, and the Mini InstantPot takes 8 minutes to get up to pressure, for a total of 20 minutes. This is the same as a dedicated rice cooker, so it's a wash in that respect. The big difference is that you loose very little water to steam, compare to the rice cooker. So you use about a 1:1 ratio of rice to water. The results are good.

So our InstantPot is guaranteed fairly regular use just from that, and anything else is just a bonus.