I like to use ramps over jackstands when possible because of the convenience. But man, those are some really cheapass ramps! I wouldn't get under my car with those. It's virtually impossible to over-drive quality ramps, which are designed to drag with the wheels when at the pinnacle (at least for RWD cars....). Also, go and get a flexible magnet or something narrower to stick up the hole to fish around from the inside.
'07 335xi 6-spd 4dr, Montego blue
'98 540i 6-spd Sport, Jet Black II
'92 325i 5-spd 4dr, burgundy