I have a 2 tier 900w (at 220v) Tfal. It gets used for vegetables when we are more than about 8 people, which is around once a month. I wouldn’t be without it.
I’ve never cooked fish in it, and I’d be a bit worried about residual fishy smells permeating the plastic.
It frees up a couple of stove-top spaces, and we can run it in our utility room if the kitchen’s a busy place. We also often lend it to friends and family.
However it does take up a bit of real estate, both in use and in storage, and there are a number of large items to clean (the pots are ok in the dishwasher). Have a trial run with what you intend to cook to make your own assessment of timings, but you’ll only need to do that a couple of times before you get the hang of it.