Ok... The thing to be aware of is cable stretch, leading to binding. Maybe the 3rd parties have gotten better since I dabbled, but if not you'll get to a point that pushing it to the floor still fails to disengage the motor from trans. Of course you'll eventually max out the range of adjustment Then, either the cable will snap, or become so hard to push down, you'd want to sell your car, at least, I almost did.
Not saying that to be a dick. Nothing's worse than replacing the same part over and over and thinking something else is going on. So, if it comes to that, you'll be in a better state of mind.