I don't care for them at all. I'm not good at them, I can seriously only do jigsaws for kids. I neither have the patience nor the skill for larger than 25-50 pieces (depending on size and difficulty).
Gluing it together sounds okay if you like the motive and have a place to place it. We glued one once and it just tends to get moved around until we found a box for it, so was kind of a waste.