There appears to be a number of cheap remote shutter release devices available on amazon, but I'm a little nervous about buying an off-brand Chinese product in hopes that it will do the job. Has anyone had success with these types of devices and their d3100? If so, can you tell me the brand a item number? I just don't want to get taken. Wireless isn't really necessary for me, but I'd love an LCD backlit display with some timer options. Thanks!