I have used ones similar to the first and last one. The jack worked fine however the top part where the adjustments were had too much free play. Another thing was the way the tranny was tied down to the top assy, it was difficult to solidly attach the trans to it. We sometimes used a ratchet strap but that wasn't ideal. The 2nd one appears to be a volume tranny shop jack. Probably a very nice unit but hard to justify for occasional use.