For accurate analysis of qPCR results, each experiment needs to be set up with multiple controls.
While the exogenous positive controls that we offer are useful, they are intended to create calibration curves for quantitative analysis. You may not need quantified results, if only confirming a positive or negative reaction. This allows for a more cost efficient kit.
To be fully confident, it might make more sense to incorporate a know positive sample as a positive control. This will enable to verify the entire sample processing chain and avoid any mistakes.