Share Piclocks view, i never ever had any joy with inserted tooling except Kennametal Top Notch on small machines. Decent HSS Cobalt the way to go.
I do have a boxed set of the Glanze, cheap budget type with German sounding name, big mistake never used because they flex, tips not much better. The £60 or £70 would have been better put towards a Sandvic, Kenametal, Iscar, Ceratizit quality tool.