simply based on whether they are in absolute strict adherence with reformed theology

The question is not "absolute strict adherence," but rather compatibilitiy.

Tell me how you think a Calvinist can honestly use the "Satisfied" tract, the Alpha Course, or Eldredge's Sacred Romance.

True godliness is a sincere feeling which loves God as Father as much as it fears and reverences Him as Lord, embraces His righteousness, and dreads offending Him worse than death~ Calvin