Since this is upstairs from the Basic Guild Hall. It has everying mentioned in the Lower Guild hall section.

Trainers up to skill 35, with a 20% discount. (still no Barb or Paladin trainer though). You can use the adds to give you added discounts. i.e. Adds enabled + adds clicked + hall discount = 40% discount.
4 More Lockers (Aleria, VT, +2 new ones).
Portals - (Frore, Nork-6, Evil Nork, King Mino -2, and Aleria) < Note, if using this portal your twigs are still active and good>.
1 Zap free per day. (Tied to your account).
1 Youth Pot per Month for 150K.
1 Minor Con pot per day (Max 15, cost 20K and drink in fountain).
1 Con pot per Day (Max 18, cost 45K and drink in fountain).
1 More Twig Holder.
Store and Bank here are cheaper than in the Basic Guild Hall.