Second part, remember these are my opinions.
1) DO NOT ever let your car leave the payment. This is a bit of advice a local gave me and he was spot on. You will have a tendency to drift to the left (especially when you see a bus coming at you) and a lot of the pavement just drops off. You will notice this when driving. If you drift to far your wheel is going to drop off the pavement and be in a rut maybe 6 - 9 inches deep. Going to be hard to get your car back out of that especially if it is muddy.
2) Learn to drive a roundabout because they are every where. I can still here the Garmen in my sleep "in 400 hundred meters prepare to enter the roundabout." They are as abundant as stop signs and traffic lights in the states...you won't be able to avoid them.
Now if I have scared you about driving please do not worry. I am a 64 year old female and the first couple of days were a bit tense but after that you will be fine. Be alert, drive the speed you are comfortable with and do pull over (when safe) and let the locals pass. I drove for 3 weeks (did a complete circle) and returned the car without a scratch. If you encounter a situation just remain calm and take a second to figure out your next move.
3) We stayed in 13 different B&Bs and there were only 2 of them I would probably not stay at again, Okay make that 3 because one of them did not have off street parking which brings me to my next point. Make sure your B&B has their own off street parking. Sure they will tell you there is parking on the street but (a) it may be full (b) you will have to be an expert at parallel parking or (c) it may have a time limit on it. When we were in Londonderry our B&B said no problem there is always parking on the street. Well, there wasn't and once we drove past the B&B looking for parking we had no idea where we were. I got to experience driving in the walled city and driving in some of the cities is more nerve racking then the L roads. The street are narrow, the locals sometimes just stop in the middle of the street to run into a store and you just have to remain clam and pray you find a way out.
In part 3 of my report I will give my opinion of some of the sights. But I will start by saying that (for me) Ireland was more about the scenery and the people. I can't honestly say there was any one sight (maybe the Gap of Dunloe) that would be a do not miss. The weather was not great while we were there so do have a Plan B for rainy days. Well, actually it rained a bit everyday but we did encounter several days where I would call it a storm more than just a rainy day....and driving in the rain is a bit tense. My husband and I both agreed that we do not have a burning desire to return to Ireland. We enjoyed our time there and are glad we took the time to do a complete loop but I do not see us returning anytime in the future...............now Italy....we still talk about returning to Italy.