On the PS3, you insert the disc, slide over to the the video heading on the XMB (PS3 main menu), and then go down to BD Disc option and hit OK. The PS3 main menu is setup as a cross bar where the main headings (Video, Music, Game, etc) are on the horizontal and the sub options (Play game, play BD, play video file) are on the vertical underneath the respective main headings.
Forward and Reverse Skip are the same as any DVD player. The only other option you really add is two menu buttons instead of one as in SD DVD. Top menu you to an SD DVD style menu and pop up menu takes you to a, well, pop up menu.
To exit the movie, you have to hold down the "circle" key (on the remote or on the controller) and select the Quit option. There is no "power" button on the PS3 remote, you have to hold down circle in the XMB and select turn off console. Of course, you can turn it off by holding the power button on the console itself.
A little more convoluted than a regular player.