I have placed my first order at Pandawill in June 2012. Order processed in few days and I received the shipment in about one week. Everything was perfect except one of the USB car chargers I ordered with the product was not working. They've accepted to send me a free one with my next order. But, I had to cancel my next order, because they were not able to get the specific color of the item. They've issued a full refund without problems.
Pandawill website has a functional search while others have radio buttons limiting you to select only one parameter.
They sell not only android devices, but also a large number of accessories and other categories.
They don't list products for pre-sale too long before they are released, making you wait for a long time. Some shops even list items even before their specs are known.
Pandawill prices are not the cheapest, but not expensive either. They have reasonable pricess usually.