I'm currently in my first year at the Carmarthen Campus taking Religious Studies, and the lecturers split their time between both Carmarthen and Lampeter. I haven't a bad word to say about the lecturers themselves- they are all fantastic, interesting people who know every student by name and really seem to care about you and your studies.
There is a lack of choice regarding modules for this year, and during merger chaos sometimes it seems like they're disorganised, but, things do get sorted, and there's more of a choice regarding modules for next year. I love it here, my course is good, it's a very scenic area, and if you're planning to study in lampeter you'll have the benefit of a larger library and better resources (including a big religious experience centre, i've forgotten the name but hear great things about it)
All in all, I love my course here, and would recommend it. Be cautious though of the apparent lack of organisation plaguing the university at the moment- we're merging with swansea met too now, so things aren't going to get much better any quicker. I haven't had too much of a problem with it though!