Pros: No mechanical problems. Connectors fit very well and don't slip. MIDI status LEDs bright enough to be usable, but not distracting. Lag is managable - I expect by adjusting priorities it can be minimized. Installs easily. I didn't have any device conflicts like the Logitech user, although I might have, since I planned at some point to install the QuickCam. So far, no crashes - no forced USB plug/unplugs; this is an improvement over my "old unstable" Mark of the Unicorn Fastlane 2x2.

Cons: Inconsistent in-out lag after several USB plug/unplugs. Restart solved this with no lag issues as long as USB stays in. All my testing was on XP SP2 all updated.

Other Thoughts: There has to be a catch. Maybe it will die after it gets hit with ESD, or corrodes due to too much solder flux residue. Doesn't matter - it works for now, and beats my other USB-MIDI converters hands down. I hope it will become available with USB 2.0 Hi-Speed, and in a 2x2 configuration.

Bottomline: Not a bad deal at the price I paid ($17.02). I would def buy another as I need them.

Pros: - Great Price
- Both MIDI IN & OUT works with my Yamaha keyboard without any problem
- Installed smoothly on XP without any driver (see note below)

Cons: - I can clearly notice large latency. The only con I can think of.

Other Thoughts: Logiteck quickcam driver conflicts with this one. I have to uninstall it in order to get it worked (thanks for tip submitted by another user here). Details here
http://forums.techarena.in/windows-xp-music/559307.htm

Bottomline: Worth the investment. Buy it at this price. The one from Yamaha is at least 4 times expensive that this.

Pros: Great MIDI cable (input, anyways)
No real latency notice- it is a uniform latency max 100ms that you don't notice because its all the same (see other thoughts)
Nice flashy amber MIDI in LED
Bright blue MIDI out (no real out tested only the light)
Works with my lame $60 AUD ghetto keyboard!
Can change patches from my keyboard!
Can play chords! Most cables fail with chords!

Cons: I'm not sure it may be my keyboard but I can't send a tempo/clock signal.
Ok so there is some latency. Big Whoop. I think it makes it better.
Creates noise coming from my keyboard speakers. I turn the volume on the keyboard down, and I hear no noise. Connect MIDI cable, and BOOM. hissing. No prolem at the moment as I am using the computer as a synth. Also, this is a crappy keyboard, and it may happen with all cables due to shid quality of my keyboard. I dunno. This won't matter if you are controlling a HardSID 4U, as it has special stuff for this. It might matter for a MIDIbox SID, for example, as there is no interference blocker (that I can see) but you could just put a cap over the ins to ground and it might work...good luck!

Other Thoughts: Sorry I can't test MIDI out, I don't have no MIDI devices besides my Medeli mc37 cheapo keyboard. I ran the cable with savihost to the Claw VSTi for a while...got bored making sweet acid sounds so I opened up the MIDI setup, added the cable as output (already input) and checked MIDI pass thru. The blue LED lit the same as the Amber one. No latency sweet!
Uniform latency. This DOES seem to change each time I reconnect the cable. I have not measured this at all. all I know, is all keys are recieved exactly the same as the one before. But take out the USB cable, plug it in again, and the note recieving latency may be different.
No tempo control- I tried this with Rebirth-338 on Clock Sync...no sync...try changing the tempo....no sync....bummer. Not a big con really tho.

Bottomline: BUY IYT IF YOU NEED A MIDI IN! MAYBE NOT OUT THOUGH!

Pros: - Its very cheap, a yamaha or edirol costs almost $100
- It does not need a special driver
- It install smoothly in Vista (32-bit)
- it has cool leds that indicate activity, both in and out

Cons: - It could be made if better material, but at this price, i think you can not get any better

Other Thoughts: - It could be a little longer, but you can use any extension usb cable
- I Did not test in 64-bit

Bottomline: - Best option to use in computers with no gameport, or that uses Vista (really does not need any drivers)