This place is a hit and miss with customer service.
Mifi probably has one of the worst I have experienced from multiple encounters. The sales people are pretty much telling you "Don't come NEAR my store unless you are 110% you are making a purchase". Beside this one lady who is willing to answer questions and smiles, the rest of them just don't even want to waste their breaths on you.
Times Circle on the other hand is amazing. Every staff is knowledgeable on the products and very detailed and friendly.