Could be wrong (I am new to this too!) but I think that these are the same people that do star nails and attitude polishes. Depends on which products you have been offered as to my opinions on how good they are!!
I've used some of their products and yes they are Star Nails nail art items. I am actually Star Nails trained so have used alot of their stuff, what exactly have you been offered? You can PM me if you want any more info, no problem.
I've the same training as Talented Talons so i'm available for questions as well and can confirm that FX is definitely the nail art section of Star Nails (often called Spangles too). I use a lot of their products and have no problem with them.