Like many thrift stores, the lower quality stuff may be over priced, but the really good stuff may be very under priced - know what things are worth and focus on bargains.
Many Holidays have 'whole store' discounts up to 50%, which can make what was overpriced a great deal.
Once an item is priced, some shoppers remove the tags hoping for a better price - so the policy is to reprice and restock tomorrow (discourages people from messing with pricing). I buy all of my ties there, and some may cost more than $5, but they are largely designer ties priced at 10x more in Macy's. Books are good deals, although only recently sorted by genre - so it may require searching to find titles that you want.
If clothing prices are extremely low, check for missing buttons, etc. The store is huge, and some of the 'Vintage' stock is priced for collectors. Check electronic items carefully (plugs are accessible), as there is no warranty. Most of the really nice stuff is very reasonably priced - but know what it's worth to you.
They now also have fitting rooms so that you can be sure of a good fit. The selection is astounding (look at displays above racks on the walls too). Overall, best to shop on a discount day (Holidays), although it will be crowded then.
more