The influence of poly(diallyldimethylammonium chloride) (PDADMAC) on pH- and temperature-sensitive negatively charged microgels was investigated with regards to different ratios between positive charges having their origin in PDADMAC and negative charges resulting from copolymerization of N-isopropylacrylamide (NiPAM) with methaacrylic acid (MAA). The concentration of the PDADMAC solution (regarding to monomeric units) was determined by argentometric and polyelectrolyte titration, the amount of MAA in the microgel was characterized with conductometric titration. The composition of the complexes between microgel and PDADMAC was available by centrifugation of the mixture and comparing the PDADMAC concentration in the supernatant with the initial concentration. Different from many other systems, we observed no flocculation at any microgel and PDADMAC ratio, but stable complexes were obtained. Because of the softness of a microgel in contrast to rigid particles, the microgel properties are strongly altered by the polyelectrolyte. Consequently, size, zeta-potential as well as the pH and temperature sensitivity of the microgel-polyelectrolyte complexes can be influenced by the adsorbed polyelectrolyte. Thus, polyelectrolyte adsorption allows tailoring the behavior of "smart" environmentally sensitive microgels.