Pros: The spycam pen is a fun gadget to play around with. The video quality is decent but the audio is bad. Can't expect too much from a pen like this.

Cons: The audio isn't the best but at least there IS audio. A little bigger than I would have liked. The pen is bigger than most other pen which might make a big deal if your objective is to disguise it as a 'normal' pen. I wished battery life was longer. Even though the pen can hold 4gb of video + audio, the battery charge only lasts 50 mins.

Other Thoughts: If the battery life on this pen can last longer than 2 hours, I'd pay double the price. However, as is, the pen only lasts about 50mins. with plenty of recording space left. What's the point of having 4gb and limited to record for only 50 mins?

Bottomline: Cool gadget to play around with. The price is decent. If you want a fun gadget to play around with, this pen is a good buy. It's also cheap compared to other advertised spy pen on the market.

Pros: Well, this was a nice toy while it lasted. I used it in a few different situations and in all cases the video was quite viewable. Even tried it in a moving car like a dashboard cam. The video was actually better than I expected.
It even worked with just my computer screen as a light.
I could use it with Linux out of the box. 4G of space was quite useful.

Cons: As others have said, the sound leaves something to be desired. Could be part of the problem with the mic being behind the clip. The auto level should have some compression circuitry to even out the levels instead of depending on the auto level. The pen is bulky and looks out of place. The tip of the pen started falling out when turning.
After only using it a couple of times, I went to use it and it wouldn't work. Press the button and it goes into recording status (Yellow light). I cannot turn it off using the button, only by using the reset.
I fully charged it and fully discharged it to see if it would reset. No joy.
The USB part isn't even picked up by any computer that I try it on, Windows or Linux.

Other Thoughts: If I have some spare cash, I will try another one which I hope will last.
I will have to check to see if there is any warranty.

Bottomline: Nice toy. Don't depend on it unless you have used it for some time.

Pros: This pen works great, video quality is very good if you don't move around.

Cons: Video will be blurry if you are walking or jogging with it. Sound from microphone is very distorted, can barely understand someone that is clearly speaking right in front of you. Out of the 2 pens that I bought, both are stuck with a 0 bytes video on it, when I delete it, it just comes back when I plug it in. Doesn't use any space anyways though.

Other Thoughts: Bottom Pen section is very loose, I filled mine with carpenter's glue and let it dry overnight, for some reason, I can still twist it for the pen to come off, but the bottom part no longer falls off. Not much compression for recording, can take about 15MB per minute.

Bottomline: If you have a use for it, it is a very good product at a very good price. Also works as a webcam when plugged in to a computer. The default time that is set on the pen was perfect for me in a way, it is China time on it (GMT +8) which is exactly 12 hours ahead of me (GMT -4) so I just remember that if it says PM it's actually AM. It's very hard to set the time properly.

Pros: : This very clearly did not come out of Q Division. It's cheap but of reasonable quality (better than what I expected) and good for recording coworkers and friends, or whatever other nefarious purposes you can come up with for it ;) The audio quality is well below what you'd get from a telephone, but it's audible in most cases. Video is grainy in all but the brightest light, and fixed focus makes closeups blurry, but you can read a newspaper headline at arm's length in a normally lit room.
I wear a sport coat at work, and this is perpetually clipped in the breast pocket next to my phone, and from accidentally bumping the on button, I have full proof of how boring my job is and just how much I hum, sing, and whistle as I'm walking through the halls. I've also managed to bump it while it while out drinking and get some funny footage of mine and friends' shenanigans.
If you have $35 to drop on it and it sounds like fun, you probably won't be disappointed.

Cons: 1) The included CD is useless and was infected with a virus.
2) The USB charger that come along with is useless, can't really charge the pen.
3) Maybe due to version problem, sometime when on it start record but after few seconds it stop and the video that record is not playable.

Other Thoughts: 1) The standby light is not as mention in the menu. Mine standby light is blue in color while the recording light is yellow in color.
2) Mine is same as the picture show above.
3) The supplier should make the pen more stable and smaller.

Bottomline: 1) This one is definitely worth the extra $10 over the cheaper ones.