I always remember the famous quote from Dave Tate, "I'll press off of anything. Give me a hoagie and I'll press off that thing!" I swear I'm not making that up.
So while foam pressing might not be as exciting or messy as pressing off of a fully stacked hoagie, it has it's merits.
For one, it is great for people who have shoulder issues; it will limit the last part of the ROM and give you shoulders some relief.
Second, you will be able to handle some heavier weights which I am all for.
Third, you don't have to smuggle the foam into a commercial gym like you would the boards. You can simply state that it is a rehab tool. And when you say "tool" you can smile and make sure the Jabroni at the front desk knows that you are actually talking about him.