I have a JosephJoseph green ladle sieve thing that I use every day.
Spiraliser - Good, only use it on "posh" dinners, mine is bulky as fuck and a pain in the arse to store and clean. Mine is old fashioned though.
A pan for the microwave which turns it into a grill (had it years and never used it, so it obviously doesn't appeal to me).
Candyfloss machine - Got for the kids, absolute rubbish. One use wonder. Didn't get good results.
5 bladed herb scissors - absolute crap, a good knife is more superior. This just gets all the herbs trapped inside and its hard to clean. My sister once used it to cut her weed when she lost her grinder and complained as a result lost most of it, she said my hand held parmasan grater did a good job though.
Oxo Masher- it's just a hand held potato masher but designed so you are pounding down. I wouldn't go back to using another.
Smoothie maker - bought with all the good intentions, went out and bought Smoothie recipe books and such. Used a few weeks and quickly because just a phase I was into.
Gun shaped ice moulds - I feel so gangsta with these in my drink. Same can't be said for cake pop moulds I am afraid.
Silicon oven mit - waste of my time and space. A tea towel will suffice.
Air fryers are a god send. I use it more than my regular oven.