User manual left a bit to be desired. (Was printed "backwards", as though printed by non-English speaking person. [no surprise, there] While there were no step-by-step user instructions, the buttons were identified, so trial and error worked to figure out how to use the scope effectively.) All in all, a good deal. Paid for itself with first use.
Possible drawback for some: Cable is rather stiff, so it cannot be pushed around sharp curves in pipes.
Do not recommend for do-it-yourself home colonoscopy.