best adapter period
its virtually lag free and works with dance pads with leds

Works on PS3
I got my Dreamcast and Gamecube controller to work nicely on the PS3, although the layout of the buttons is inverted, which is a minor hassle.

The Trio Linker Plus
This is the best USB adapter I have ever used. I converted PS2 controllers and a IIDX controller.

The PS2 controllers worked perfectly with OS X and Windows out of the box. The IIDX controller did not originally, but I installed the official drivers from their website and now it works perfectly too.

This much better then the laggy beast that I had from RedOctane before.

No title
It's a nice converter, but I can't seem to set it up to use the D-Pad properly. It either is used as an analog stick or it can be used by itself but stops the analog sticks (and triggers) from working while it is being used.

TrioLinker
This thing works great with most of the games I play. The only issues I have is use my gcn controller, I seem to have some problems with the analog for some games but other that that it's excellent product. For PS2 controller, make sure you turn analog on by hitting that button in the middle between the two analog sticks. I was wondering why analog didn't work until I hit that button.

Overall it is an excellent product. I would definitely recommend this converter for anyone that wants to add more console feel to their pc gaming.

Cobalt Flux + Trio Linker
I do not know why people say this adapter is lag free. While yes, it works with the Cobalt Flux, it also produces about 30ms of lag. Go ahead and run "Calibrate Audio Sync" in In The Groove for PC to see for yourself. As an example, test your Flux using one of these adapters, then test your keyboard. You can offset the lag with the GlobalOffset variable in Stepmania.

All in all I feel this device is not accurate enough for serious Cobalt Flux owners; though, you will probably not find a better adapter to use unless you make your own USB control box, wait for an official USB control box to be released from Cobalt Flux, or maybe even use a PS2 to parallel adapter (I cannout vouch for this).

Cobalt Flux & Triolinker
If you guys have a CF, then you definitly need to this. I recieved mine today and got it working in no time. :) No lag + quick and easy = the best! I can't reccomend this converter enough.

OS X
I am currently testing my friends one of these out on Mac OS X (10.4.6) with a Gamecube Controller, and apart from initial calibration (which is smoothed over quite abruptly) it works perfectly fine - no drivers or installation of any kind needed.
Good news for mac owners :) I shall be promptly buying two.

TrioLinker
The only converter that works on the Cobalt Flux, every time. If you've got a Flux or any other dance pad, you can't go wrong here.

EMS Trio Linker
I gve this 5 out of 5; excellent item, easy install.
I tested all three types of controllers and they have perfect calibration, and the device is compatible with my emulators and my PC Games. Satisfaction here, and I will buy from play-asia again.

excellent
this is an amazing product, installing was a breeze and i've tried with ps2 and cube controllers so far and they work perfect. works good, i'm very impressed. btw, i dl the latest driver from the website. i did not use the one on the floppy. buy this converter if you need one

Triolinker
Coolies! :) If you are after a converter for use in Stepmania then you can't go wrong here. I have a metal logic3 dance mat for ps2 and it worked a charm first time. Cant recommend it enough.

TrioLinker
I just got mine this weekend, and all I can say is that it works perfectly! Make sure you download the latest drivers FIRST and install them prior to plugging in the unit (there is a new version on the manufacturer's website as of this writing, and it supercedes the one on the included disk).

The only issue I have with the game is that there's no start menu link to change the settings of the joypad (you have to go in through the Control Panel to change the settings). This isn't necessarily a bad thing, as changing the controller settings is a BREEZE once you're in the configuration screen.

A really nice feature of the Trio Linker is the ability to save custom joypad settings for any number of games. There is also the ability to set autofire for any of the buttons on your controller.

The versatility of this device is great, and well worth the price. Highly recommended!

TrioLinker
it work well, perfect used in emulator !

TrioLinker
It works nicely with the official controllers of the three consoles. AirStyle PS pad didn't work at all while on analog mode (digital mode works fine) and changing controllers of different consoles requires taking the device in and out of the usb port (or reboot).
Other than these two annoyances it seems a decent and solid product.