In most cases, yes, experience is very important and can only be developed over time. But all the experience in the world is worthless if the contractor doesn't take pride in his/her work and treat the customer with respect. Caring about your reputation and the finished product is something that cannot be taught. Again, what is important is that you have done your homework about the contractor and the work you would like to be done. Finally, what it boils down to is “Do I feel confident having this person in my home?” You can't put a price on that.