Flash: Saving every one of us

I've been using Off Camera Flash(OCF) for almost 10 years now. I've used tonnes of different flashes for said OCF: Canon 550ex, 540ez, 580ex, 580ex II, Nikon SB28dx, Sigma 500 Super, Olympus FL50r, Yong Nuo 560. I've even modded some of them to take radio triggers (see here and here). I've made ring flashes and strip boxes, along with various bounce cards and bought loads of modifiers to shape their light. So that's my OCF background. I'll talk more about techniques and shoots again, but for now I want to talk about the gear, specifically the flash in OCF.Recently I ordered 2 new flashes (despite owning 7 already). I went for the NEEWER® TT850 (Amazon US), which are rebadged Godox Ving v850s. These flashes have a guide number of 58, which match the power of any of the flagship models from Canon or Nikon. They also come with a lithium battery giving 650 full power flashes, with a 1.5s recycle time. You can get matched triggers that allow full power and flash control remotely(FT-16s) for up to 16 groups of flashes(in 1/3 stop increments too, not all flashes allow that). The heads have a full 360 degree swivel, and don't require holding a button in to start turning. They also have a lamp that projects a criss cross red light allowing you to see exactly where the flash is pointed. Spec wise these fulfill 95% of what I could want in a battery flash. And yes, I have been looking at getting new flashes for a while! Why did I go with the Neewer brand? Basically it's cheaper than the identical Godox V850 Flash (US). Godox are an OEM producer for Neewer, Cheetah and Lencarta amongst others, so it's not a question of being higher or lower quality based on the prices. The brand sets the price.After getting the flashes I saw they've an 860c, with TTL, so I've ordered that to get a matched 3 flash set (The 860 is the same flash with the auto addition). There are other options out there, but this is the first set that have built in long life batteries, which sealed the deal for me. I've done load of work with them now and am still quite impressed with them. I'm shooting loads of real estate currently, so I had been wasting loads of time walking to and from flashes to get good light balance. No more!Have there been any cons? Yep. They have a sleep function that I only discovered when they went asleep on me while mounted into a truss for MK in Carbon, where it was a pain to get at to wake them up again. The sleep settings can be changed but I just didn't know it about it at the time. Also the power button isn't flush, so you can accidentally turn it on putting it into the pouch after use. I've had the batteries die more than once from this.I was teaching with them at Hamps Hall-this years location for Paul RG Haleys regular residential photo training (or photo retreat if you prefer). The class found the flashes great and really loved the remote power and modelling lamp. Here's a quick portrait of Lisa from one of the classes. Single flash at 1/4 power into a Lastolite Trifold umbrella, with a mini reflector from below and a bare flash at 1/8 power or thereabouts pointed at the wall behind Lisa.While not as powerful as my Elinchrom Ranger Quadras, the TT850 with FT-16s gives me the same kind of control as I have via the Quadra/Skyport combination but with less weight for applications where the power just isn't required. As to the 7 I already had, I've been selling them off!