Ben, I have a siimilar tool , Gopher ll. Main differences I notice between the two are mine has a folding shaft minimizing storage space and the trigger on my handle can be locked with a switch thereby eleminating the need to keep gripping pressure on the trigger while lifting objects. It works fine on lighter weight and simple objects such as boxcars but I would caution using it to grab items with intricate detailing as the pressure needed to grab the objects could harm delicate, detailed pieces. Also, yours doesn't mention a holding weight but most including mine are rated for no more than five pounds and I wouldn't trust it on object heavier than that for fear of it sliding from it's initial standing grip when you lift an engine.
Also it can be clumsy to use when attenpting to grab smaller items, especially those smaller than its attached suction cup "fingers". Also impossible to grab small objects surrounded by other objects closer then four inches without those other objects getting in the way.
As for using two as gunrunnerjohn suggests, that can prove be awkward positioning and maneveuring them in tandem for the best grip and lifting position. Also they're actually meant for lifting items below or above your reach and not for obects simply out of reach and horizontal to the height you're holding it. Also, adding padding will compromise and lessen its gripping strength considerably.
