I've been to the Maximum Impact shows in Dublin twice in the last 3 years. I enjoyed both of them quite a bit. More than I was expecting in fact. The matches were really good for the most part. I had heard that in WWE house shows the performers really tend to phone it in, so I was surprised by how much they went for it.
They also cater to the crowds a lot - changing stories and face/heel alignments just to please the local fans. The first time I saw them, Beer Money were heel on television, but they were face in Dublin because we do enjoy the drinking.
And British Invasion were heels, for obvious reasons.
I'd definitely recommend going to see them. Tickets here are very reasonable anyway. At least they are here.