In reply to tonyg9241:
Can't comment on the company or their reputation. One question I would ask is the ratio of punters to instructors. I've seen pairs of guides out with very large groups which means you might not second more than a route in a short day. Sometimes a guides assistant will set up a couple of top ropes before the main group arrive and that might be your day.
It might be you could pay more for 2:1 and you'll get much more out of it. Rjukan is an amazing place and might be a springboard into something you'll love. Ask a lot of questions, all the best with your plans.