Aer Lingus Business Class - BHX-DUB-MCO

Does anyone have any experience of flying Aer Lingus business class, particularly on the DUB-MCO leg? The aircraft is listed as an A330-300. I've seen mixed seat review, particularly about the front row. I'll be traveling alone, so any pointers for a decent seat?
Also, as I've booked BHX-DUB-MCO as business class and I see the BHX-DUB leg whilst classed as business is configured entirely as Economy, will I have any issues with luggage. I've got 3 bags (23kgs) allocated within the ticket, but this configuration of baggage is not recognised if I look at booking BHX-DUB as a stand alone flight. I've checked the site and it also says that I can combine weight allowance upto 32kg per bag as long as I don't exceed 69kg(?) in total. Again, If I load up 1 bag with 32Kgs and have two smaller cases (say 20 and 10kg) will I be OK when departing BHX?
Will I have to collect my luggage and re-check at DUB, or it is it checked through?
Will I arrive and depart out of the same terminal at DUB (ie will be BHX flight arrive in the same terminal as my MCO flight departs).
I'm sure I've heard others talk about clearing customs and immigration in DUB for the MCO flight. Is that the case? How does it work?
Any other tips or gotchas on this route?
TIA
Paul
Also, as I've booked BHX-DUB-MCO as business class and I see the BHX-DUB leg whilst classed as business is configured entirely as Economy, will I have any issues with luggage. I've got 3 bags (23kgs) allocated within the ticket, but this configuration of baggage is not recognised if I look at booking BHX-DUB as a stand alone flight. I've checked the site and it also says that I can combine weight allowance upto 32kg per bag as long as I don't exceed 69kg(?) in total. Again, If I load up 1 bag with 32Kgs and have two smaller cases (say 20 and 10kg) will I be OK when departing BHX?
Will I have to collect my luggage and re-check at DUB, or it is it checked through?
Will I arrive and depart out of the same terminal at DUB (ie will be BHX flight arrive in the same terminal as my MCO flight departs).
I'm sure I've heard others talk about clearing customs and immigration in DUB for the MCO flight. Is that the case? How does it work?
Any other tips or gotchas on this route?
TIA
Paul