They are expensive and they are a luxury. If you want to run Irish trains, well you will need one at least. It is discretionary spend, if your household budget can afford it. Going on previous batches, they will look and run well. The trouble being that not everyone who wanted these to arrive may have the money to hand. I do not know what the batch number produced will amount to, but I would predict that given the size of the market for Irish Railway stock just enough were produced to make the issue financially viable. They will not be available for stockist to reorder so factoring all of this in to the equation I would say you will be lucky if there are any available to buy this time next year.
Finances dictating, get in while you can. Things are expensive for Irish railway modellers right now considering what has hit the market and what is to come. As has been stated a number of times, who would have thought modellers of the Irish Railway scene would have to budget for numerous releases. If you can afford it buy what you want. In times to come when you get your dream railway up and running, not much point then rueing the fact that you missed out on one of these.