I don't own any but I do know it's a very different ballgame than residential rentals.
"Buildings" could mean a relatively-high-turnover strip mall (we've all seen that spot that's a nail salon one year, then a crappy restaurant, then a good restaurant, then an Ace Hardware, etc.) or something big and stable like a Walgreens.
From what I do know, in addition to bigger numbers all around, you're usually looking at lower cap rates and longer vacancy, made up for by often long leases (20 years is not uncommon in a Walgreens-type scenario) and often very low maintenance (the tenants usually pay for that anyway under these circumstances from what I understand).
So best case, it's a lower-yielding, more stable, less labor-intensive investment. However, for people with non-eight-figure wealth, such buildings are probably expensive enough that with even one your portfolio can't be all that diverse (doesn't leave room for much else).