Hey, I just got into the network marketing industry myself and I looked VERY, VERY seriously at Thirty-One! I hosted a party back in the summer, the rep sold over $1000 worth of merchandise and I got a boatload of free stuff!
I have never had a problem with the quality of the items. They have held up very well, and honestly compared to other similar companies I feel the prices are very competitive.
Like I said my party was a huge one, and not one product was incorrect. All were monogrammed properly, the correct pattern, bag type, etc. They did send 2 extra items that were not part of the order...I gave them back to my consultant.
Honestly, if my area was not so saturated with Thirty-One reps right now I would sell the product in a heartbeat -- I love it and I believe in it that much! I have seen the Initials, Inc. stuff online...VERY cute but I have not seen it firsthand to judge the quality, and it is a very similar product to many companies out there right now...Thirty-One, Maddy Moo, Polka Dot, etc.
In the end I signed up with a completely different kind of company -- 100% all natural foods. It's new to my area, great niche, consumable product, low start up, no monthly quotas, wide open market, etc.
Good luck with your decision!