Yes, and again I say yes! Greenham is a figure too neglected. I absolutely love him, and I'm glad to find someone else who's even read him!
I much appreciate his meditation on Ps. 119. His explanation of knowledge consisting in generals and practice in particulars is very helpful for understanding Puritan practical divinity:
Teach me good judgment and knowledge: for I have believed thy commandments.
He maketh this prayer though he believed; because his knowledge was in generals, but his practice in particulars: therefore if God in the particulars did not direct him, he should fail in doing. Hereof cometh it, that the learnedst men are deceived in particulars, because they rest in their general knowledge.