I have a handful of these and they're working great for me. Battery life is as advertised, they affix nicely to rigs (especially if you have the silicone case which have a velcro and magnetic back!) And have word clock at a pretty good price! TS have a plethora of accessory cables for these and they're super well made. Read more
Now if only they made a slate to match the world would be a cake walk timecode wise! The only bummer with these is that the menu system can be a little inconvenient to navigate. Everything is clearly labeled, but it seems that the buttons are not the most responsive... And when slapped inside the silicone case, even less so. But for the price, size and all that it offers, I think the UltraSync One is the best bang for your buck out there.