Third Party Bookkeeping: Bench vs Proper.ai vs Other?

[Patrick McKenna]

I am in the process of interviewing & comparing third party bookkeeping solutions and have come across a few good ones, but wanted to check here to see if anyone had any input. 

Proper.ai and Bench are my two front runners. Proper.ai is definitely more robust with the ability to work with my own software (i.e., Rent Manager) but is also a good bit more expensive. Bench is cheaper but also seems a little more manual, but does have a nice dashboard interface. 

Another option would be just to hire someone off upwork, but I have heard mixed reviews and lots of trial and error with that. 

Would love to hear pros / cons or details of anyone else's experience.

Thanks!