CPG is no doubt the flagship of the dividend-paying oil producers, but don't forget that they are at the mercy of the price of oil just like any other producer, and they simply cannot ship all of their oil by rail to capture the higher prices.
If oil goes back to $100, CPG's share price will easily jump back above $40.
But if oil drifts around, or god forbid, goes lower, then all bets are off.
CPG is not like a pipeline or power company with set-price contracts. They are at the mercy of the futures markets. Never forget that single vital detail.
As long as one invests knowing the risks, no problem. But no one should be suggesting CPG is risk-free.