Hmmmm, I guess a 3, although I’d expect more from a Delta.  Oddly enough, there aren’t a lot of brands out there with a three hole setting and we couldn’t do one of the other fixtures with maybe one big cover with the faucet and handle coming out of the same cover, bc the idiots that did our plumbing set them all too far apart!  So, anyway, it also would have helped if someone had put in the right MANUAL with the right INSTRUCTIONS!!! 
It would have been even better if my husband realized that BEFORE he started (and got halfway through) installing!  It does what I need without major problems so that’s good, but eh, it doesn’t wow me, and sometimes it drips.  I’m talking about the faucet, not my husband...but then again......