Hi all,
I haven't actually tried any brands other than Tops, which I introduced as an easy supplement to a fresh food diet. Suki loves them, but will only touch them if they've been wrapped in newspaper, like a candy necklace. It makes them into a foraging toy I can wrap around anything in her cages/perches, seriously cuts down on the dust (she has to eat them one at a time after chewing them out, or eating them bite by bite in the paper, which holds the dust), and I haven't noticed any smell. It probably helps to keep them fresh, as I make the twists about once a week. The biggest pain is keeping up with production, of course!