It's alright. If you've never had porchetta before, then it's a decent option and relatively well-located.
However, I've found quality varies quite a bit. Sometimes, I'll get that right balance of lean and fat and a good amount of crackling. Other times, it will taste fatty and limp. I don't think the bread they use here is particularly good - seems too dry. It's a shame that something so often overlooked can ruin a sandwich.
The mustard is free but I'm not a huge fan of the nickel-and-dime toppings system. As wonderful and simple as pork on bread can be - one of my favourite porchetta joints in Vancouver used to have salsa verde to help cut through the fat. Think having another free sauce option would help resuscitate the sometimes fatty pork. The topping at extra cost just seem odd to me -- cheese? truffle? ... on porchetta? Also, I realize that hot sauce is free -- but it just seems sacrilegious to me.
The last time I was here - it was busy as hell. And the fried chicken sandwich special they had looked much better than my porchetta sandwich. So, don't skip over the specials. And recently, they offered a soft shell crab sandwich (which was sold out). Odd, but I actually think the '& Co' portion of their name is better than their porchetta.