Hi Stuart...welcome to the Forum
Just the usual stuff to look for...full service history by reputable repairers using quality parts and if poss, before things are due.
Usually the sign that the car has been looked after by the previous owner(s).
More specific faults, worth looking through the forum posts to get an idea of what goes wrong but really its like any car, you get good ones and bad ones.
Good luck with your search
cheers Trevor