For all things Tiger I model, I recommend visiting tiger1.info. My current understanding is that Tiger Is in the Big Box are pretty good but will benefit from some small modifications.
I cannot recall reading about any significant problems with Takom Panthers or Tiger IIs.
There are at least two discussions on Missing Lynx detailing major problems with Takom Panzer III hull based models. One person in these forums reported that the Takom Pz.Kpfw.III Ausf.N w/ Winterketten is much improved.