The CJEU doesn't have that much credibility after they ignored written law about ECB rules in a purely political ruling. I think it made a joke of itself and its independence should be thoroughly questioned. It also should restrict its rulings to matters were the EU has a mandate, which is luckily fairly restricted. So Poland has quite a case if they listen to their national constitutional court.
"The most up-to-date statistics (as of July 2016) show that in 2014 Poland received €17.436 billion from the EU whilst only contributing €3.526 billion. Poland also received nearly €2 billion more in EU funding than any other member state in 2013 (France being second highest). " https://en.wikipedia.org/wiki/Poland_in_the_European_Union