I haven't tried them yet with our guys. I'll pick some up next time I go to the store.
The only down side is they can get smelly fast on hot days. However they have great vitamins and are super easy.
A few of my everyday veggies are broccoli florets, brussel sprouts, bok choy and carrot. I mix up other things but those 4 are steeples. Partly because of the great shelf life.
My birds won't accept a lot of frozen veg..luckily broccoli and brussel sprouts are happily accepted.
Also they seem to prefer frozen thawed raspberry, which is interesting. I think fresh raspberries change state quickly. The frozen were stored shortly after picking. I have even done side by side.. out of curiosity. They prefer the frozen raspberries. I watch a lecture that explained how parrots UV vision helps them find perfectly ripe fruit. Really amazing stuff