This phone works best when plugged into an AC power supply. Thus for most users who may need to be away from power outlets for long periods of use, this phone is not a good option.Big bright screen is attractive, but a massive power hog. Forget the quoted 4 hour talk time and 10 day standby; you will be very lucky to get 90 mins of talking or 2 days of standby, and that is with Bluetooth turned off. With Bluetooth on, you'll be charging this every other day.Even worse, the battery goes from 2/3rds to no power very quickly and unpredictably. You will start the day thinking you have several hours of talking left, and will find yourself at zero power after a 15 minute call. Carry a spare battery and / or charger to avoid frustrating and inconvenient downtime, or better yet get a more efficient phone.Another big problem with this phone is the music player feature. Unless you plan on purchasing an expensive media plan from your carrier, all the connectivity features of this phone are pointless. Downloading stuff by the kb is insanely costly, and the media plans add significant cost to the monthly plans. Also, to transfer music from your PC to this phone by USB is agonizing, as the phone takes more than half an hour to transfer a single CD (10 songs). To put a lot of music on this phone takes inhuman patience, and then you have to use junky Samsung proprietary earphones to listen to your tunes as no headphone adaptor jack is available.On the positive side, MP3 playback through the Sync speakers sounds surprisingly good. The signal strength is usually very good, a pleasant step up from older Samsung designs, as good or better than Nokias, a big achievement for Samsung. Call quality and speakerphone performance is also very good. Camera takes good pics, but only has a 2X zoom on 1.3 MP and no zoom at all on the 2.0 MP setting. Samsung has much better camera features on some of its other models.The phone does look nice and it is pretty durable and well-built.Bottom line: if you want a phone to make calls on, the A707 Sync has good call quality and excellent signal strength. However, the rotten battery life and rapid non-geometric decrease in battery life makes this phone unreliable and irritating to use for its primary purpose. If you add silly junk to your usage like watching videos and browsing the web, you will only decrease the battery life and make the phone even less useful as an actual telephone.The true Achilles heels to all these multimedia phones are the added cost to users for subscription plans, and the limitations of current portable device battery life. The Sync makes you acutely aware of both of these problems. Until better batteries are available, Samsung should not build phones this inefficient, or at the very least should not call them "wireless". You don't need a phone line attached to these, but you will need a power cord!