Pros and cons to dating a married man?

I recently met an anesthesiologist through my work, he left me his number and I texted him out of curiosity. He reveals to me that he is in an open relationship with his wife of 20 years and they have the agreement to see other people when he goes out of town on his business trips. We have similar interests and if nothing else, he said we could be friends (possibly with benefits). I understand the obvious cons to dating a married man.. but he's very mature, established, a published scientist, financially stable and the most I can expect from him is a fun night out, maybe a little romance (which I never get), and possibly a letter of recommendation down the road. I have the opportunity to see him tonight, or next time in July or in the Fall. Any opinions?

Pros and cons to dating a married man?
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