This is my understanding/impression, based on my travel to Rome, where I purchased a pair at Campanile, plus subsequent attention to their shoes.
I believe Campanile is a Roman retailer of shoes which has been regarded as the high-end Roman RTW vendor, although probably in reality the 'high end' to the masses. It is certainly not truly at the pinnacle of Roman shoemakers, as there are bespoke firms such as Gatto and, perhaps, Lattanzi (which may have a shop there).
I assume Campanile contracts with various Italian manufacturers to make their shoes, as opposed to actually owning a shoe manufacturing facility. Their shoes are fairly typically Italian, made in a Blake or Blake/Rapid manner, rather than in the Goodyear welted construction.
I was there during their winter sale (January), and when the dollar was much stronger (say 1 Euro = $0.83 [!]), but their prices were much lower than what one thinks of when considering the high-end British (E Green & C&J Handgrade) or French makers (JM Weston). I think my shoes were around $140 on sale, down from perhaps $225. Nice looking shoes, worth the money, but not of the quality of a Green or Weston (at least the pair I bought).
I own 8 pairs of RTW Campanile shoes, including two pairs of rubber soled sneakers.
In terms of style, they are great. Very classic, very Italian. My favorite brown oxfords are Campaniles.
As for quality, I'd venture to say that they are so-so. Actually, the leather tends to "dry up" more than the one used by other brands, so it needs a lot of conditioner, often.
I personally got very good deals on my Campaniles because I bought them at their boutique in Mexico City, right before it closed down (nobody knows the brand down here). Also, since I have so many shoes, high rotation keeps them in good shape for many years, even if they are not the very best.