Pros~ incredible fast performance. It’s constructed very well the packaging is the sturdiest packaging I’ve ever seen. It came preset at 16 sec vac 1.6 sec seal and 3.5 sec cooldown. It works perfectly with those settings. Very large chamber volume perfect for most items even preserving documents coins ect…Cons~ instructions are unacceptable BUT to help others here is informationFrom left to rightthe first 2 digits are the vacuum time. The buttons below translate to increase decreaseThe second 2 digits are heating element seal bar time. Again buttons below increase decrease. As stated 1.6 seconds puts a perfect seal wide as a pinky nail.3rd digits represent the heat at cooldown time before chamber release 3.5 seconds is a good numberThe buttons on right from top to bottom translate toTop) single sealMiddle) double sealBottom) resets the system if something goes wrong.Overall it makes a food saver look and perform like a cheap plastic toy this is commercial grade.Be sure to get a bottle of vacuum pump oil and regularly check it’s level and change when the oil discolors. The oil color indicates when it’s contaminated with moisture or other contamination. If you want your investment to last maintenance is key. The oil is cheap.Extra tools needed is a 3mm Allen wrench to drain the oil. I found using a foil pie plate is perfect for draining the oil into. I can not stress enough to maintain the oil in the pump just like oil in an engine.Really nice vacuum sealer. Super strong and whisper quite vacuum pump. Easy to use. Wide range of control settings that will cover all range of uses. Very nice and handy to have. Only downside is that the control button labels are only in chinese. But they are laid out just like the buttons on most all other models, so no real problem. GREAT PRICE!It didn't come with instructions. The buttons are in Chinese. Someone tell me what the buttons mean