Note: The maker supplied a review sample for product testing, the opinion of the item is my own personal viewFor review I looked at the Canon version of the flash but all the features seem to be the same for the Nikon version. This model is a much more affordable dedicated flash compared to OEM makers at the same time offering "most" of the features that higher models have with the exception of a few custom settings and weather sealing there isn't a lot to separate them. Fortunately corners have not been cut on build either this has a dense feeling plastic and a big LCD display as well as the expected PC sync and external power pack ports and flip out white plastic card/wide angle diffuser. Battery door is a single thick plastic hinge (very much like my own Metz flash) it feels strong enough and makes loading the 4 x AA cells quite easy as they're in a straight line. Metal shoe with a manual screw lock it's a secure fit on the hotshoe. I've rounded up a list of points I liked and found weaker on the flash these are as follows:Areas I liked:+ Good overall bundle decent case supplied with stand (brass thread) and flash diffuser+ Fully compatible with E-TTL for metered exposures on and off the camera+ Strong feature set functionally offers just about all you want in a "dedicated camera flash"+ Supports HSS (high speed sync)+ Recycle times are quite fast from 3-4 seconds depending on power output+ Large easy to read backlit LCD display, excellent AF assist "dot" beam+ Wireless flash master and slave function with TTL, strobe flash+ Optical slave mode+ 2 year warrantyWeaker points:- Zoom motor noise somewhat unrefined (a bit audible)- Custom functions are cryptic numbers rather than a text description of the setting- No modelling light- User manual requires some translation workNotes:I fired off 35 quick succession flashes at full power with no sign of the flash overheating so this doesn't seem to be an area of concernHead rotates 180 degrees left and right and can be angled down slightlyI have no way of accurately testing the guide number I would say visually it's a little less powerful than my Metz 58AF-2 flash and probably closer to GN 50 though few will find the difference significant it does offer more power than mid level flashes from other makers. Metering was mostly consistent a little variation as you get with all flashes nothing obvious stood out though compared to other third party makers and the Canon flashes I tested it with.Operation is very simple though the manual doesn't really live up to the product it's workable but could be clearer with correct translations some strange words are used (reflective flash for bounce flash for example) it's a small point but could use a bit of attention from the maker. It integrates just fine with Canon flashes and other makers the biggest attraction here is it can act as a wireless flash "master" and "slave" using optical flashes or a standard non metered manual S1/S2 modes one for instant firing and one for pre flash suppression. The multi flash strobe mode is not something I use often but it's there if required the exact no. of flashes will vary depending on the power output.Having owned and used quite a few flashes most of the weaker areas on this unit are a moot point ie fairly minor I'm particularly impressed that the maker has seen fit to offer a 2 year warranty too. If you run this next to a 430EX Mark II a solid little flash but somewhat dated (it doesn't have a bounce card or an on camera strobe mode/ wireless master control) you can almost buy 4 of these flashes for the price of that single unit (it's a little under £200 at the time of this review) For off camera work you can pick up some radio triggers though optical works quite well for most indoor uses.Third party flash makers have really been improving and they're offering nearly the same features as top end units for a fraction of the price bar long term use which I will report on and update if required I can't really see how OEM makers can justify the excessive prices on flashes. This model makes a strong case for lesser known brands and warrants very serious consideration. Bar a few smaller areas this comes with a strong recommendation.