  The quantum Monte Carlo study [S. Gandolfi, H.-W. Hammer, P. Klos, J. E.
Lynn, and A. Schwenk, Phys. Rev. Lett. {\bf 118}, 232501 (2017),
arXiv:1612.01502] of few-neutron resonant states provided results incompatible
with rigorous few-body calculations. In this Comment we point out serious
shortcomings in the work by Gandolfi et al, leading to misinterpretation of
unbound few-body systems.
