No complaints about the brains of this device. It is a joy to see Lang's solid positional world champion engine finally arrive in a mid-range dedicated unit. This is the perfect engine to set a student along good positional habits. Same for the wide opening variety. Also unique is the Lang engine's fine endgame skill augmented by a small hash table, making this the best endgame player since the Novag Sapphire/Diamond line. Despite its strength, they have also included some Fun levels which make mistakes and a Tutor mode to warn you when you make mistakes, which should make it less daunting for beginners. The housing is sturdy, but with design flaws. The rounded sides are just wasted space. At least if they were flat, you could place captured pieces there. The compartment for storing the pieces for travel is too shallow to fit the pieces! Even if you could squeeze them in there, it only is roomy enough to store three-quarters of the set, due to extra space taken by the battery compartment. This is possibly why other resellers don't even mention this compartment as a feature. And lastly the buttons under the board are much stiffer than most pressure-sensory models; I have observed children have trouble activating them.