HELP (Which proxy service is best between buyee, neokyo, and from Japan?)

This is my first time buying something from Japan and it comes down to buyee, neokyo, and from Japan. I do see that buyee seems to be more expensive than the other two and if something goes wrong during transit, buyee will most likely not give a f*ck. Could someone explain the cost and pro/ cons of these services?

Add-on: Would I need to pay customs tax when it gets in the US? I'm pretty sure the item just has to be below 800 dollar value to not get charged right?