I took a quick look at the Pocketrak CX yesterday. It's really amazing how light it is. 92 g is about half the weight of the next lightest flash recorder. (For those keeping score, there are a couple of HiMD models that are this light.)
The bad news first: The CX preamp is below average, particularly considering how expensive the unit is. There is plenty of hiss noticeable, and there's an annoying whine in there, too. I think it's electrical interference from the LCD display. These faults are disguised when recording loud music, but they are easily audible when recording quieter subjects.
Other problems include no 24 bit recording, a 2GB file size limit, and a legible but very small screen.
The CX does have a limiter, high pass filter, and mic sensitivity switch. You can insert track marks while recording or during playback. The CX is easy to use, with well laid out controls. It has a built-in speaker, but it's not loud at all.
The CX uses a micro SDHC card, like the memory you'd buy for a cell phone. I have broken a couple of memory cards trying to pull them out of the back of a cell phone, so I had my doubts. Not to worry -- the CX card has the same sort of "push to lock, push to unlock" slot that the full size SDHC calrds use. So it was easy to insert and remove the micro SDHC card. Since a micro SDHC card is about the size of the nail on a man's index finger, I still have concerns about losing the card. But it's easy to insert into the CX.
Micro SDHC is cheap. I bought a Sandisk 4GB card for $9.
Somehow Yamaha gets 20 hours of WAV recording from a single AA cell. Amazing! The package includes an Eneloop AA rechargeable cell. The CX will recharge the Eneloop when you make a USB connection.
The $400 price is out of line. The Tascam DR-1 sounds a lot better, and costs half as much. I guess Yamaha thinks people will pay a premium for a very small and light unit.
OTOH, stealth tapers will have no problem concealing this unit.
Flintstone