Well, I did go in the end so if it's Dublin you're heading for the Wicklow Way I would definately recommend. I only did about half of it in the end but it's a very nice walk indeed, with a landscape that's beautiful yet strangely unlike any other I've seen in either Ireland or Scotland ( or England and Wales for that matter ).
I don't know what you plan to do for accomadation but if camping is your thing there's plently of secluded spots on the way. If accomadation is what you're after than it's very wise to book ahead, there are places along the way, I had a Wicklow Way guide that I bought off Amazon.
Not sure what time of year you're going but if it is in the late spring/summer months on then I would say Midges are there but they are nowhere near as bad as they are in the Highlands, I had a mesh hat and that was good enough for me.
Hope that helps,
Ian