Comment on the paper "The finite square well: whatever is worth teaching   at all is worth teaching well ", arXiv:1505.03376v2 [physics.ed-ph] by K.   Razi Naqvi and S. Waldenstr{\o}m
  In the aforementioned paper, the authors claim that my results concerning the consequent application of Garrett's method for obtaining approximate expressions of the bound states energy of a particle in a finite rectangular well are incorrect. I shall show hat this is not the case, and demonstrate that both their and my results lead to the same conclusion, i.e. that the consequent application of Garrett's method is equivalent to Barker's approximation. 
Victor Barsan
physics.ed-ph quant-ph