If you're new to the world of Light Meters, Sekonic is a brand that seems to have been around forever in this space and is very well respected; it was an easy choice for me.
I purchased it for the flash meter function - I just got my first studio light set so rather than rely on trial and error for set-up I thought a meter would be a bit easier. The meter itself amply fills the palm of your hand and has all the buttons where you need then for single handed operation. It's very simple to use - you just tell it the camera ISO setting and shutter speed and set it to 'get ready to meter', hit the flash test button on your light's remote trigger and up pops the settings - spot on every time so far! The wireless system that came with my lights made it easy for me but even if your flash uses a cable trigger the Sekonic has a cable connection which means you can trigger stobes directly from the meter.
As well as a flash meter it also provides incident and reflected light readings. While this might seem out-moded I've found myself using it instead of the camera meter a couple of times already for certain subjects; it also makes you look like you know what you're doing...
It comes with a cord, carry case, battery and a different diffuser and as well as normal light metering and flash, it can also be used for cinematography and provide EV readings that can be converted to LUX via a table in the manual.
At 118x64x24mm (140x87x24mm in the case) my only gripe is the large size and light weight - if it was the same weight but smaller it would be great for travel but it is quite big and as such I fell it lends itself better to studio work, for which more weight would have given it a higher quality feel. For this reason I was tempted to give it 4 stars but it's nothing more than a personal preference and you can't really argue with the price/operation/accuracy making it a very good product, so for me it definitely gets a 5* rating.