Contractor had easy time installing, with it's self sealing rubber gasket.  Works very well.  Smooth functioning and holds the water in well, no leakage when down. Well constructed. 

The chrome pop-up 'cap' portion is quite large,  between 2.5-2.75 inches. Being large it will hide any discoloration around the drain hole part. This looks good in a good size sink, used in ~ 14x17 inch sink.  I wouldn't use this in a small sink as I think it might look too big. (unless color matched the sink.)

I had another Kraus faucet set (waterfall type) that came with a pop-up drain & we were all impressed with how it functioned so hence the reason of getting another Kraus drain for the 2nd bath remodeled. 

Will be considering  Kraus for kitchen faucet as well as Grohe or other high end faucet.