Most of these reviews are correct.  I've used this product for over 10 years.  I've owned at least 10 of them.  They ALL leak, but they are very nice for oil filters and catching plugs.  Here are some tips.  Do not over-tighten either caps, the plastic will break.  Do not do more than one oil change before draining pan.  Do not put this in your vehicle, drain it into a 5 gallon gas tank to transport to Autozone.  It's better that way anyway so you don't have to go everytime you change your oil.  When you drain the pan make sure the big lid is facing up the best you can.  You do all this and your floor will stay clean.  Make sure to have a rag to wipe up any small leak you may have.  Another tip too is opening is not huge on this product so if your plug is on the side of your engine's oil pan take into account that the oil will spray out about 8-10 inches.  Use a big flat metal pan or a piece of cardboard if you don't want stains on your floor.  If they would improve the threads on the caps, this product would be perfect.