The 'konsole' application is KDE's 'xterm'. It's a nice little app, but there are some caveats to be aware of.
First caveat: If you get the idea that you'd like to set up a session with some tabs and then "save" it, so you can make it the default -- well, forget it. That functionality has not been implemented yet. I would suggest using 'screen' to do multiple tabs, instead. It is a fully configurable, mature tool. Unlike 'konsole', it also has the advantage of ubiquity -- you can use it on (practically) any box you happen to be at.
Second caveat: By default, 'konsole' will send notifications like "Bell in session 1" or "Silence in session 2" -- and these notifications can be annoying. I don't know exactly how to deal with them, but I do recommend going to "Settings -> Configure shortcuts". Once there, search for "notifications" and get rid of any/all active shortcuts relating to notifications.