This is an editor specialized on DV files. All other kinds of video are converted to DV, using a lot of time. I tried to import an m2ts of about 130 MB and it tooks more than 5 minutes. Just imagine how much time you would need with GB files… Not to mention the doubled (or more) disk space. After that, it jups to the end of the clip, exactly like Cinelerra. Unusable for me.