Stalla Mocks

I’ve done the CFAI past papers and the Schweser mocks. Anyone attempted the Stalla Mocks? Feedback on their level of relevance and relative difficulty? Is it worth the time to do them?

I took one of them, but it is much different than Schweser that I am used to… the whole style just seems different… I guess I am just so used to Schweser… I may just do the mult choice for them, but not the morning parts…