Picked up a set of these today. We mainly got them for on the bikes, so distance isn't too much of an issue, but it should help with getting the right turnings a bit more.
Initial thoughts are fairly positive, but as others have said, we doubt the range claimed. So far all we've done is test them through the house, and with Hulahoop in the back room while I went for a (very) short walk down the street, probably a distance of 200m through a couple of buildings, they worked ok for that range, tomorrow I think we'll go to the park and see how they play there.
For what they are I think they should do us nicely, a simple (and fairly cheap) means of being able to give directions while cycling and just generally chat. The hands free bit actually stayed in my ear for the short walk, which is amazing in itself as I normally struggle with anything that isn't my hearing aid mould in my ear. The vox worked ok at it's most sensitive setting, but had a habit of cutting out briefly mid-sentence, not had that problem with PTT. There is a PTT button on the mic section of the hands free which is handy.
They come with 4 rechargable AAA's each and charge nicely in the cradle, just drop them in and away you go, we had no messing trying to get things lined up. Using AAA's also makes it fairly easy to keep it powered when away from a charging point providing you can get some batteries. Quality seems ok, and they fit nicely in the hand, the PTT button also seems a good size for easy use and isn't difficult to press or find.
As a bonus they are waterproof when held upright!
"The Twintalker is protected against vertically falling water drops when enclosure tilted up to 15degrees according to the IPX2 standard."
In hand:
The PTT button:
Hands free, there is also a small clip for attaching it to collars etc.:
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