The Rosta electronic cruise is a little work to install but it is life changing if you do long hauls and well worth the effort. http://www.amazon.com/Rostra-Universal-Electronic-Control-250-1223/dp/B007ZCQD9S
I used NEP throttle locks on my last three bikes and never had any issues with them. There are plenty of people who will tell you they are cheaply made and suck but there are also plenty of people who will tell you that they are inexpensive and work well for the price. If you decide to get one make sure to get the CC-2 model (single cable version) which does not require any modification for use with the VFR.