I can’t say enough good things about the SB 700. I have a second one on back order right now. I have purchased and returned 2 Yongnuo units and never again. I also have a cheap (maybe Bolt or not) ittl unit that works but it is a piece of junk. I also have a slave unit and an SB 300.
The SB 700 comes with a case diffuser and two color correction snap on filters. Really easy to use. Just snap on the filter to match ambient light put on the diffuser and get great results.
Exposure is always great.
Now I also use four Yongnuo triggers when not using the Nikon CLS setup. They are also cheap and poorly designed but get the job done. They are not at all easy to understand and the instructions are poorly translated from Chinese.
Of course the price is tempting. Just don’t expect the quality you get from Nikon. You get what you pay for.
BTW. I almost never use my SB 300. It is a lot smaller than you might think and I don’t think it will fire the SB 700 as a master like the pop up flash does. I would not recommend it.
The SB 700 has lighting fast recycle time when your subject is within 15′.
At the end of the day. What are you needing it for? Does your camera support the CLS system?