I use a Pentax F wireless remote when I'm out and about, and a wired remote (can't recall the brand - cheap Chinese version I suspect) for indoors macro work.
I also have the option of using my Cactus V5 as a remote - for really long range. Plug it into the wired remote socket and the Cactus, set it to receive, and the one in your hand to transmit and voila - 100m of range!
The wired one works better with extension tubes/bellows - I have this double mirror flip issue with lens fittings lacking the transmission pins and lowish battery power - the wired unit sorts it