Star-mate mate
Remote hand control, no cable. Hand controller controls slewing/centering/manual guiding, changes slew speed, motorized focuser control, changes between 6 preset exposure times (set by user with accompanying software), initiates exposure and automatically takes 10 shots at user set intervals, exposures can be cancelled at the any stage with a press of a button on the hand controller, exposure count check from at least 10 meters away (depends on battery strength), user defined radio frequency in case of local conflict with other units, autoguiding interface through LX200 commands set (you'll need to check the website for more detail on the interfacing
), the same autoguiding cable let you change exposure presets from the accompanying software, you can also control slewing directly from your laptop if you want, but laptop is not needed to operate Star-mate, only to initially set your exposure times which can be done before setting up for the night.
Interfaces with Argonavis so you can drive the navis directly from the hand controller and using the serial with a suitable splitter you can also view the movement of the scope as an inticator in a Planetarium program.
I think that's all but I may have missed a couple of things.
Negatives, Hmmm... if I don't put the controller in my pocket or attach it to the mount with velcro I have to remember where I put it down
The motor focus control sometimes isn't as fine as using the handcontroller that comes with the motor focuser (JMI). I find I have to disconnect the camera release cable from the camera end or Star-mate end when I want to change exposure times other wise when I press the button to change the Exp Time the shutter releases (the same button is used), I don't find it a major problem though.
That's about it. I will say though that I don't know how I ever managed without a remote control for slewing, exposure release and all its other advantage. It is unbelievably handy. I'm surprised that the Meade remote hand contoller hasn't made a bigger splash on the hand controller market 'cos I love mine.
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You're looking to spend $35 US for an adapter to go on a $200 timer release when you can have a fully remote shutter control, motorised focuser control, slew control to 16X or more ? (depending on your mount), autoguiding interface, argo navis/planetarium interface for about the same cost. Plus I think it will interface with DSLR Focus (? have to check that one 
) Don't see the logic behind your choice.
