I thought about weighing in on the FreeMake thread but since you specifically asked in this one, thought I'd add my comments here. ClownBD is a GUI that integrates eac3to, tsMuxer, and ImgBurn into one interface. Those three programs have outstanding reputations and I use each one independently. In terms of flexibility and quality, you'd be hard pressed to find better solutions than eac3to, tsMuxer, or ImgBurn for what they specifically are intended to do.
IMO, the only question about ClownDVD is whether you find the interface convenient and understandable.