Summary: I purchased this recorder for paranormal investigations as I needed to be able to adjust the microphone's sensitivity. The DVT3500 also has 360 degree pickup and is quite sensitive so even the faintest EVPs get captured very clearly. I can't find any fault with this product (some reviews complained about the on/off switch but it doesn't bother me). In all, I'm very pleased with my choice and would buy another in a heartbeat should this one ever need replacing.
Summary: I use this as a field recorder for radio interviews. Two big plusses for that: the stereo mic is open in both directions, so you don't have to constantly flip the recorder around when talking to another person (I would sometimes miss words when doing that), and you can record WAV files with top sound quality.
Summary: The 3400/3500 are similar except for NAND flash. Surprisingly it's the 3400 that has 4GB internal memory while the 3500 has only 2 GB. This review applies to both. I have a Zoom H4 and by comparison, this recorder is both compact and lightweight. If placed along the index finger with the base at the crook of your thumb, it will reach to below the tip of your index finger (or 4.6 inches long x 1.6 inches wide).
Summary: This is a great recorder, while not complicate to operate you should take 20 minutes to review the manual. After reading the manual I was able to pre-set my recording tastes and add an extra 16gb sd card and access it without any issues. The protective cover, good quality earphones, high quality rechargable batteries and phone pickup device makes this a great value. By the way it works excellent with Dragon Speech and Windows 7 64bit .
Excerpt: Inderdaad een prima apparaat,makkelijke bediening en goede geluidskwaliteit. De Nederlandse taal staat er niet op dus moet het in het Duits of Engels.Volgens Philips is de Nederlands taal ook niet te verkrijgen.Toch vreemd voor een Nederlands product van een Nederlandse fabrikant al wordt het dan ook in Korea gemaakt.