Post mounts are pretty good, coating is not very durable, probably hence the price. I had them sit overnight in the rain and some rust came up next day at random spots. Once the roof is up that's not going to be an issue. Consider coating these mounts with motor oil, especially on the inside where treated posts go in. Also, hardware that is included is not for mounting these 4 x 4 post mounts to concrete slab that you walk on. It comes with flimsy sleeve anchors, not wedge anchors that are required for mounting to the slab. However included sleeve anchors will work for mounting a block of wood to the wall, but I would not use included anchors outdoors, not the right finish, definitely not for a damp location long term and definitely not for floor applications. But these are included for some reason, and I cant imagine why someone would want to mount a 4 x 4 post to the wall. So maybe if y'all including hardware, at least include appropriate hardware even if it has inferior quality. Wall application - sleeve anchors to compensate for the hole opening and weight pulling down. Floor application - wedge anchors, secure + holding power against lift. So if you are considering these for mounting posts to concrete that is on the ground, get the right wedge anchors. You can go up to 1/2 inch wedge anchors with factory holes, I would not use anything smaller then 3/8. Going with 3/8 inch anchors will give you more play room if you mess up your holes. with 1/2 inch anchors, it will give you a ton of holding power per anchor, but you will have to be spot on with your hole marks and drilling.
Joseph Ofosu-Appiah 
