I think the challenging part is to find a good one. You would think in this internet era that it shouldn't be so hard to find an exceptional TA but like any other business out there, there are some who unfortunately are terrible. You don't need the extra stress while planning your wedding, it should be a fun journey. If something doesn't sound right, it is not. Listen to your instint. I lived through a nightmare with someone who was not only terrible but very dishonest. I did in the end the found a new TA who literally saved me. It is totally worth it once you find a great one as torilynn said.