CPLEX, XPRESS and Gurobi are the gold standard for solving an MIP of a meaningful scale (relative performance will depend on the specific problem but you cannot go wrong with either of these three). Unfortunately there is a big gap between performance of open source v/s commercial solvers in OR space. Type of problems I need to solve are usually unsolvable on open source solvers (very large scale supply chain problems). For smaller problems, OR-Tools or GLPK or CBC do work fine - but once you go commercial, there is no need to switch back to an open source solver.

My typical setup is using Pyomo for model formulation (gives me flexibility to switch out solvers with ease). I bundle multiple licenses using GAMS, it is more cost effective than purchasing individual licenses from solver companies.