I have had a Backyard Buddy lift for many years with no problems. Perhaps the safest 4-post lift on the market. They are a bit pricey. I believe I paid around $3,200 fifteen years ago. Purchased the taller one to give me more head room. They are made in Ohio with USA or Canadian steel...no Chinese stuff!
Here is their link:
www.advantagelifts.com
Good Luck and Stay Safe!
Pat