Just dislike them. No give in them at all. My dad used one to tow his mates Transit off a hard shoulder. As we're going off a slip road, his mate in the Transit makes a mistake think his hand slipped off the wheel or something and it just jolted the back of the Chrysler out. Lucky my dad just accelerated out of it.
The RAC ones I've seen have a bit of play so its miles safer as long as the tow car is both heavy enough and within its towing weights.
I've towed stuff with a Corsa but no way I'd use a bar on that as its such a light car! Just use a rope.
