To test the method, we have chosen three reactions with a gradually increasing degree of complexity of spectral analysis. First, we monitored the easiest reaction -sucrose hydrolysisproviding spectra with only slightly broadened and well-resolved peaks. Then, we monitored two Lewis-acid-catalysed hydrosilylation reactions in non-deuterated solvents in which a lock system could not be used. Moreover, the fast kinetics of those processes made it impossible to perform gradient shimming before acquiring a first spectrum. In consequence, the resulting spectra contained shifting peaks with distorted lineshapes. Additionally, one of the hydrosilylation reactions provided spectra with severe peak overlap, hampering the conventional analysis.