I've used/tried just about every board on the market including the stock Bob Long boards, WAS, Frenzy, Kila Vibe, Virtue, Tadao M Series, and Vaporworks boards. None of the boards compare to the Yakuza. The combination of the OLED and optimized code helps bring out the performance capabilities of the marker in a very real way.
I shoot a 2K5'd GZ, Excalibur, FL Viking, Texas Storm, Ripper, Ripper 2 and Ripper 3 Intimidators. I run a Halo or an Empire Reloader B (and now a Pulse) with a PMI Pure Energy or Crossfire Tank.
Ease of use, improves the marker's performance.
Only downside is cost.
The Tadao Yakuza board is an upgraded board on many fronts. Most people are familiar with the Tadao M series boards. They've been highly popular and incredibly successful since their release for a variety of markers. The Yakuza takes that success and brings it to another level.
The code on the Yakuza's has been rewritten to improve the performance synergy of the board and marker which optimizes the capability and performance. The OLED is the first thing that most people realize. Unlike many other boards, you can now save settings in a profile and load them at will. This allows people to rotate between PSP tournament settings and Semi setttnigs that may vary based on local field rules and tournament restrictions. The profile storage is a great concept and makes it easy for users to transition with a button click instead of having to go through several menu options. The OLED is bright, crisp and shines through even on the brightest days.
The ability of the Yakuza to not only utilize the 4C Eye system in the Gen5 Intimidators and Marq's but optimize the functionality is revolutionary. With four eyes the board coordinates the requisite delays to shorten the time between cycling without breaking paint. This leads to a nominally faster but significantly more consistent string of paint in a semi-only mode. In a capped ROF mode, this leads to a much tighter grouping while allowing for a broader base of loaders that can now be used without the fear of ball chops from half feeds. Essentially the cycle and delay times have been reduced by ~40% through the dynamic ability of the board to "see" the movement of the paint as it's falling while queueing the other components to cycle. This synergy optimzies the marker like no other board has done.
Will has also made the algorithms more crisp and that refinement helps execute well with only two eyes enabled. The board turns on with an easy on off button that's integrated. The battery connects to a terminal built into the board instead of into a harness. The Yakuza board also has a special port for RF chips and the placement of the ports helps eliminate the crowded feel of other gripframes. It uses a crisp and consistent switch and facilitates a smooth pull of the trigger. The OLED screen isn't too busy and is easy to read. The board comes shipped in a sturdy case with instructions and custom Tadao grips that maximize visibility without adding to the bulk of the marker.
The only downside is that the board costs $170 which may be a sticking point for some, however you really get what you pay for with this board.
The pinnacle of board to marker interaction which enables dynamic functionality, improved performance and maximizes the overall capability of the marker in a very discrete way. Well worth the $170 price tag.