Hi,
I've the LUK learning system lately for my kids as I got it overseas directly and got a fren's fren to hand carry it back for us.
My 5.5yo and 3yo are enjoying this set esplly my 5.5yo. To her, its an easy task and she enjoys it every bit while my 3yo son is getting hang of it slowly since he is trying the "Mini" Luk (5-7yo) instead of the "Bambino" level which is more suitable for his age. I've lately bought a preowned Bambino set for him and realised that its too easy for him since he started the difficult level. Nevertheless, he also enjoying it.
My children are trained using Logico, Xiao Tian Cai, Kinderkit and other equivalent tools so LUK learning system is just another "game" for them to occupy their time.
However, I find it too costly to get it here and will not get it if not becos of the cheaper source my fren and I managed to get it.
Rgds,
three_js