I recently acquired a ZMF-II clock.
The display is an LED compared to LCD which all the other clocks discussed have. It flashes between the delay time and regular time when in use. That’s a bit strange. The move counter is also kind of strange the way it displays.
The clock does have a nice feature that the DGT and Saitek clocks do not. It shows the complete time left, including seconds when the total time is under 60 minutes. The DGT and Saitek models only show the seconds when the time is under 20 minutes.
Setting the clock is not so hard, it just takes a bit of time getting adjusted to it. One shortfall of this clock is when we press the center button to pause the game, pressing that center button only once more resets the clock back to the beginning time. With the Chronos it takes more than only 2 short presses of the center button to reset the time, except when it is in a pure blitz mode.
The “buttons” are the touch sensor variety exactly like the Chronos touch sensor models and works the same as well.
The ZMF-II is not one I care to use in G/80, d/5 or longer times when the Chronos II (either button or touch model) or the Chronos GX all do a much better job at that.
I have put the ZMF-II with my HOS Championship series chess set and a silicone board for my G/30 - G’45 play.
For what it’s worth, I have a Chronos II button and a Chronos II touch clock that go together when I am going to play G/70 with either delay or increment. I use the touch model when the game is slower and quiet is desired. I have a Chronos GX that goes with my 1950 Dubrovnik set and vinyl roll-up board (my favorite set by the way, as it was Bobby Fischer’s) for G/60 and up, with either delay or increment. I also have a Chronos II button clock with the bare aluminum as the finish accompanying my HOS Liberty series chess set with a silicone board for Blitz and skittles in most all indoor situations.
i also have a DGT North American clock that goes with a Cavalier plastic set and silicone board from Am Chess Eq for blitz and skittles of the, perhaps rougher variety. I also have a DGT 2010 Limited Edition in red with black trim going along with a HOS plastic Collector Series 3.75" set with a silicone board for Blitz and Quick play when I’m in the mood. The problem with the DGT clocks, for me, is the rocker arm doesn’t show who is on the move as nicely as the Chronos, Saitek, Excalibur or ZMF-II clocks.
I have my Saitek Competition Pro III going with a HOS Zagreb '59 Rosewood set with a leather roll-up board for playing, pretty much all the time, at Barnes and Noble and at Starbucks. The green LEDs on the Saitek clock and the green of the leather board (House of Aragon) with the Rosewood set looks really cool on the B&N green tables.
I also have and Excalibur GameTime II for use in shorter events, but I find I don’t use it much, I must confess, when the others are available.
I also just got a DGT 960 in Black with Red trim (can you tell I like the color red?!?) and it goes in a little bag with a HOS plastic Marshall 2.875" set for when I’m out to eat with a chess playing friend at a Bob Evans or Perkins. We can play chess while eating.
If I would be limited to only one clock, it would be a Chronos II button model. If I needed to not spend that much money I would get either an Excalibur GameTime II or maybe a ZMF-II. The ZMF-II isn’t as nice with its move counter and the flashing numbers during the delay time is, well different. Yes, if I wanted to get only one clock and not spend more on a Chronos, the Excalibur would be the one.