Do note that the Yale doorman has a shitty antenna. It works with the XM1, but you often need to fiddle a bit
A FlexM1 however works rather good, but is still annoying sometimes.
I personally went for the ubiquiti access kit on my main door, and would highly recommend a reader that is connected to power (strong antenna, continues reads) than a battery powered reader (sends small pulses, then activates when it detects a tag. - sometimes works immediately, but sometimes it takes… too long and is annoying)
In retrospect, If I hadn’t already installed a FlexM1, I’d opt for a custom FlexDF for the ubiquiti system instead.
Then again, that is a pricey system