The only thing missing is kits if you want to change from one version (countertop) to another (inline). Also photos did not have adequate descriptions and were too small. But sales service is great.
Having installed the countertop filter, I am impressed by the general build quality. For the price that is appropriate. The bypass valve works very well. My only complaint, and the reason for 4 vs 5 stars, is that the teflon tape around the fittings did not stop the input fitting from minor leaking. It may have stopped after a day, I didn't notice any leakage this morning. I will try a silicone o-ring or gasket if it still leaks. Flow rate is pretty low, but adequate for drinking water, which isn't needed in quantity. Another point is that the double male adapter for our large diameter Delta Waterfall faucet is unnecessarily long. The small diameter double-male adapter is short, which is appropriate, but doesn't fit our faucet.