My recommendation is for one thing: Paint. Upstairs they have a mountain of mistinted paints for $6 a gallon. I grabbed two colours that were fairly close to what I wanted and mixed em together at home. My living room slash kitchen is HUGE! I had enough of this gorgeous perfect colour to do the whole thing with a bit left over, for $12.
The rest of the store is nice, they have an enormous selection of coloured tape! Prices are reasonable but not super cheap, helpful staff, lots of neat stuff. But go there first if you need paint.