I would for sure go with it. You can eliminate any timer bars that may be not trust worthy. Also it would allow a fail safe for your heater if it were to 'freak out' on you. You could up grade it with the MLC module for lunar control and free up on of your channels for the skimmer w/ float valve mod, or another heater. I always recommend two heaters on anything over 50 gallons or anything with a sump.
As for ease of use, very intuative and easy to use and program. Just don't get an older model they are discontinued and no future upgrades available.
Hit me up before you do pop for one, I may throw down with you to get a better deal on a 2nd PC4!!