OK-
my experience has been mostly positive. There are differences between the 2 cultures and academic theories. That said here is a short overview, forgive me if I am all over the place!
In the 5 year program, The first 1.5 years are basically the same as year 1 in the US. The time is spread out....you get almost 4 months off at the first summer. There is a VERY heavy emphasis on Anatomy. I think Biochem and some Physiology(renal) is lacking. They try to follow a systems based approach but that is not always the case. Then you do one year...april-march with the normal breaks for summer(2 months) of Pathology and Micro. The Path teaching is very, very good. At the same time, you begin clinical training, basis clerkships in Medicine and Surgery. All they really want you to learn is how to do a H&P, not spend hours in the OR etc, so it is basically a year long Into to Clin Med class. It is a bit difficult, because there is really no patient management, but this aspect is improving every year and there is a stronger role in the early clinical training expected. After that, you do Ortho/Epidemiology-Pub Health/Tropical Medicine. Then USMELLYS over the summer. You come bact to your 4th year and do the rest of your clerkships...OBS-GYN/Psych.... over the next 2 years.
Evaluations-
There are essay and Mult Choice exams(MCQ) at the end of each term. At the end of the first 1.5 years, you have an exam, 1st Professional Exam- it is a cumulative exam in ALL SUBJECTS studied up to date. All subjects have an Essay, SHort Answer Written and A MCQ, plus a Combined MCQ in all subjects. Oh yeah, there are Oral Exams in front of your whole cadaver table in ANatomy q2 weeks during the 1.5 years.
Path and Micro, Med/Surg, there are exams at the end of each term and at the end...2nd Professional Exam..same thing as the 1st but just Path/Micro/Med/Surg. From then on it is just exams on each rotation. To move on you have to pass the professional exams(you can resit them if you fail) To Graduate you have to Pass Final Professional Exam...Med/Surg/Peds...they include everything.
THe school relies on what I feel is subjective grading. You never get exams back to see how you did on questions, only get numbers and they repeat questions a lot. In general the admin/exams are disorganized but if you can deal with it, the clinical teaching is very good.
As for DUblin, it is a great city and since the course is spread out, you can travel and see Europe. The school cut out some of the long vacation time and finish in 4 years but that is one less year to money they can suck out of you(Irish students are now free so they have to make it up)
I think some of the facilities are lacking, they have less than some US HIgh Schools and they take more and more students each year.
Most all of the students from N. AMericia do well, they are usually more motivated and there is good unity.
As for getting into the US and still coming here....if you do not want a competitive residency ie ORTHO.ENT.EMED.DERM.......it will not be a problem, that is not to say you will not get one. RCSI Students from US and Canada do well in the USMLE and Match, but all IMG's have more difficulty with the more competitive programs...that a said student matched ENT last year.
I will end it there for now saying that I have and I am enjoying myself, I work hard and do well. Like so many other things it all comes down to your motivation and what you put in to it.
If you need some more info let me know!