The 840 Pro is very fast, and should be reliable (the previous model (830) is), and has very low idle power consumption so are perfect for laptops.http://www.anandtech.com/show/6328/sams ... 6gb-review
Various other reviews are out there now the NDA has been lifted.
Price TBC, availability ~22 October.
There is the non-pro-840 model coming out as well, which is going to be their budget model. It uses 3-bits per cell data storage so its reliability is going to be a concern until proven otherwise, it will have a lower cost but also lower performance, more info soon when reviews of this model appear, AnandTech have a sample that they are reviewing at the moment, so you wont have to wait long.
Hopefully the 830 model will drop further in price as well.
NOTE: The power usage mentioned on the first page of the review is "for the controller only" not the whole SSD, the real power consumption is on the last page.