I have no experience with drum machines, but as others have mentioned, they all have their own merits.
If I couldn't have had a live drummer with some good back beat at my beckoned call, I would have loved to have a drum machine in my day.
I used to use the old black plastic
Franz electric metronome, as it forces one to be aware of and keep the correct tempo especially when the bpm is slow.
If the click of the bpm is too slow, try doubling it at the beginning, but that can get pretty annoying.
I used to mute it with a towel or blanket!
When you hear or see older live jazz(and even rock on occasion) performances in which the bassist is soloing, the drummer would only tap out down beats, and on the hi-hat only.
As in all instruments, the mark of a good musician is not what you play, it's more in knowing what not to play, or what you do with the space in between, and when and where to do both.
I found that the basic metronome left more space to the imagination and left more of the creative groove and back-beat to me, but that's just my two scents.

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