I love this Precision Sous Vide + Temperature Probe 7 Quart Digital Slow Cooker! It removes any anxiety about serving a perfectly cooked steak.  No more cutting into the meat to check for degree of doneness. The steaks were medium rare, just as I had entered, and very tender- delicious. The entire process is taken out of your hands except for a very fast sear just before serving. Another nice feature- you may put the steak in hours before serving- the temperature will hold exactly.
I highly recommend this product.