Guess that is more personal.
We did it, with our last visit literally walking in, getting the board, pick up a couple items in Festival store .... and then leave. Another visit was also pretty much in and out - we parked at Epcot, rode monorail to MK for that day, went back to Epcot walking inside for a snack then leaving. We had thought we'd stay longer at MK then enjoy Illuminations but the day was hot and tiring so we opted to go back to our hotel earlier. The other two days we had planned at Epcot for DS to do the attractions.
It's not big but perfect size for say a bar to cut lemon/limes but I'll likely just put mine in my office. It is that type you can order online personalized, not top quality but if you ordered one you'd likely pay $20+ dollars for this size.
But if it puts a huge crimp in your touring or you really have no interest .... I suggest you go the first day to get your magnet and ask to look at the cutting board. You can decide then if you want to make the extra efforts to return for it.