Reviews online. However, sometimes take them with a grain of salt. Some things I have found with reviews on anything are, people trash things for little insignificant problems that are minor, competitors pay folks to trash a product < deceptive practices but truly happens, people give low ratings if they dislike the dealer they bought from rather than rate the product on its own merits.
So, read them to get the true issues or lack there of.
People were not too kind about the Grey Wolf but so far, minor issues but overall, decent for the money. Actually a bit nicer than other units costing more as we looked at many.
Good luck reading reviews....they usually give me a headache.