I wouldnt recommend them, they are nice, but for 5 syns they are tiny.
I just look for whatever seems nice that are around 100 calories so I dont have anything more than 5 syns (1 syn = 20 calories for stuff with no free food allowance). Single Time Out bars are pretty good, I think they are only 4 syns (a smidge over 80 cals I think) and quite a bit bigger than those aero things.
For bubbly choc, ASDA have own brand bubbly choc bars in a snacksize thats just 3 syns - they come in a bag of snacksize and you can get white or milk chocolate.
Wouldnt this be better off in the "Low Syn Snacks" thread?
I daresay Starlight will move it soon enough