I'm intrigued by the idea of a mini guitar to throw in the car while I'm driving kids around to events and I can do a little practicing while I wait. When I look online, I see lots of toys, brands I don't know, then the Squier Mini, Epiphone has the "vee wee", and then a bunch of expensive travel guitars. Has anyone ever used one of these? Are they "good enough" for getting in some fingerboard time? How far above toy level would you suggest?