They advertise everything as being in stock, which it never is. They are actually a drop shipper. They have no inventory of their own. If you order something it will be backordered for possibly many months. It may or may not ever be delivered. Either way, you're unlikely to get a refund.
The scam their running is design to take your money regardless. The policies, which are hidden in the site, provide for no cancelations. So once you order a part you think is in stock, a day or so later you will receive an email stating it is backorder until whenever. After several of these emails, continually pushing back the shipping date, you may actually receive your order. But if you purchased expedited shipping to receive it in a few days as promised when you place the order, you're out of luck.
I have filed complaints with the BBB and FTC, which have been forwarded to Sears Holding, which owns Sears PartsDirect.
Customer service is all but non-existent. The site exists only to take advantage of people.