I've had a DD-100, DD-400, UT-100 and loved them specially the Ultra Tremolo (which sounded way way better than my TR-2). Sad lang kasi Di ko pwede panggigilan because of their plastic casing so I ended up selling them. I still have the Ultra Flanger which is still waiting for a new owner.
If only they were made of tougher shell and switches, I might have changed my mind (the only reason why I still keep the Boston/GTX stomps is because I can literally jump at them without worrying about them breaking up and sending pieces all over the stage)