BTW I posted this on someone else thread in the vegetable section and got 1 answer but I would like some more people's opinions before I go using it so I figured it would get more attention if I gave it it's own thread.
I can't find the other posting right now in the Vegetable section, but your lack of responses is why the forum so strongly discourages duplicate postings (and esp. those that appear under already established threads): it's too easy to miss a new request for information.
Personally, I would consider pieces as big as my index finger--much less the index finger of a man (I believe you're a man?)--to be mulch rather than compost. If I had purchased this...stuff...hoping to dig it in as compost, I'd (1) be upset at having been misled about the product, (2) be looking for a refund or exchange, and (3) failing #2, leave it on the surface as a mulch. Therefore ==> no nitrogen tie-up.
The small particles will be dragged down into the soil by earthworms and rain or applied water, so the plants will benefit from the compost-sized particles. The large chunks will help keep water from evaporating from the surface, i.e., they'll act like a mulch. I'm just sorry you paid compost prices for mulch.
Is there an independent nursery nearby that could sell you honest-to-goodness compost
Sunset Zone 17, USDA Zone 9