Well there are several GUI’s but the GUIs all rely on command line programs which of course can also just be run from the command line. Best to just look in yast -software management. search for burn or dvd or cd. Always have found k3b to work well, but there are all sorts of specialty programs for special purpose. To be honest I’ve been getting away from DVD/CD and moving more to USB sticks for personal storage.
I use k3b too, since years. There is/was however an issue with the backend, wodim, when recording files larger than 2GB. I ended up changing to the original cdrtools from schily.
Since upgrading to 13.2 KDE 64bits I’m using k3b from packman and cdrtools from the multimedia repo. Although wodim is installed the cdrkit-compat package that provide the translation links is not, so AFAICT wodim is not used.
I haven’t burned a disk in ages (I usually use cloud services or usb’s for data transfer/storage)
when I did burn I preferred k3b and I’ve tried a few of them including gnome’s brasero and xcd-roast.
I remember a few years ago trying nero-linux, it was an interesting application burned a few disks with it without any issues, but it was a closed app and it was dropped almost as soon as it came out, it hasn’t been updated in years.
I remember there wore some issues when k3b was moving from qt3 to qt4 but I never had any problems with it.
I like K3b and I had been using it since ever, however it can’t burn my Blu-ray ISO images for me so I had to look for an alternative. I’ve found Nero for Linux 4.0 to be a pleasant surprise, tough it’s not free (in any sense).