I am not an ASE certified master auto tech, never was, because I started my auto mechanic career in the 50's, 20 years before they came on the scene in 1972, by then I had my own 7 stall garage in Richardson, Texas. I retired in '96 and my shop had a low ceiling so we used floor jacks and jack stands ALL the time with NEVER a mishap or injury. So I am a believer in jack stands. My son in law gave me a pair of ramps but my 400 just pushed them along so I sold them and went back to my stands..... I like being able to scoot around under the car without the ramps... just my 2 cents..