This review is for: VEVOR 1/2 HP Sump Pump,3960 GPH Cast Iron Submersible Sewage Pump (1/2 HP)I was struck by the weight of this thing. It is cast iron and it feels like it when you try to carry it!We set this up as a back-up sump pump in case the current sump breaks or the float gets stuck.The instructions are good. It it super easy to take out of the box, assemble and install.We attached this to a battery back-up system so if we lose power, the battery backup will power it.I also have a couple other things that I would recommend to anyone counting on a sump pump... a sump pump alert system which does two things.... senses if water overflows the sump pit and it detects energy being used so if a sump pump starts to run continuously (maybe a stuck float) or if you lose power, it will notify you on your phone. The other thing I did was set up a camera on my sump pit so I can look at it whenever I want to (it's in the crawl space, so not easily accessible).Glad to have the piece of mind this back-up sump pump is providing.It seems like terrific quality. The price seems very reasonable.Hope this was helpful.