The RC-1 remote control

• the price ($20 at B&H)
• you have an option of a two second delay before the picture is taken.
• the size and weight (60 x 25 x 12.3 mm, 15.5g)
• bulb feature: when used on bulb setting, a single press of the RC-1 release will open the shutter, and a subsequent press closes it.

• having to always press the self-timer/remote control button which only stays set for four mins. (It can be really annoying if you are waiting longer than 4 mins for action and you have to continuously remember to press it again)
• will only operate up to 5 meters from the camera, and cannot be extended.
• will only work if the remote is in front of the camera (although you can bounce the beam off a mirror). The remote needs to have line of sight to the infra-red sensor on the camera; since the sensor is located near the auto-focus assist light, this can give you little margin for error when using long lenses.
• fragility. The RC-1 is small and light; my RC-1 did not survive a drop onto tiling from a height of around 1 meter.