I used to use the pressure cooker a lot, it was particularly good when camping, quick and gas-saving. Also I sterilised my baby's bottles, dummies, etc, in it.
I had a simple Prestige with just a weight on a little spout. These days, pressure cookers seem to have complicated plastic contraptions which I don't trust.
My original one was aluminium which I wanted to upgrade for a stainless steel one. However, these only seemed to be available with the plastic valve system.
I did use one for a bit but the plastic gubbins soon packed up and I haven't used one since.
If they did one with the basic metal mechanism and a stainless steel pan I would buy it but I cook far less meat these days and it probably wouldn't get used so much, as vegetables cook quickly enough the conventional way and I find things like casseroles taste better if done in the oven.
My favourite use was for crème caramel.
As there are only the two of you, I think it may not be a necessary purchase. For bulk cooking, I would consider a slow cooker rather than a pressure cooker.