I'd prefer to have seamless gutter over sections put together. I did the house years, uses 33' sections, which were the longest I could get from HD. I put them up with the help of one person and it wasn't "easy" work.
I always said I would have someone roll out a section next time. Well when next time came around, I bought some sections again and put them together for the front overhang on my garage. I didn't really need gutters but it does keep you from getting dripped on when walking out to the garage.
So what will "next time" be for me ? I can't answer that but I do know having someone come out, roll off seamless gutter and putting it up in a short period of time can't be a bad thing.