The block/component editor works well in that when you double click on a block it enters editing mode.  What isnt so good is how you close out this mode, currently its a command line to either SAVECOMPONENT or CLOSECOMPONENT.  I know that you can add keyboard aliases to these commands to make it quicker/easier but it would be really nice to be able to do ?SAVECOMPONENT or CLOSECOMPONENT from the right mouse button context menu.