The Clip+ is very small and light and has a clip on the back (hence the name!) so you can easily clip it to an article of clothing. It has support for various codecs including Ogg Vorbis and FLAC, which is nice. It also has support for audiobooks. It has an FM radio, which you can record and an SDHC card slot for expanding the memory.
The device is very easy to use. You attach it to your PC with the included USB cable and drag and drop music to it. When you disconnect it from the computer, it'll do a quick scan and update your music library. As long as your music is tagged properly (I recommend using MP3Tag to tag your files, as it's free and easy to use), you'll have no problems and all of your tunes will be correctly sorted by artist, album, song and so on. You can also browse by folder if you prefer. The controls are similar to that of an iPod and you'll have no problem using the device and browsing your collection of music. To charge it, just attach it to your PC with the USB cable. It charges quickly and lasts up to 15 hours from one charge.
The screen is nice and bright and easy to read, although it is quite small. It doesn't display album art, but taking the size of the device and the screen into account, this isn't really a major negative.
The sound quality is excellent. The included headphones are not the best, although they sound better than the headphones bundled with most MP3 players, but if you upgrade to some better headphones, you can appreciate just how good the Clip+ sounds.
Tip 1 - A new EU directive means that the maximum volume setting for the Clip+ is reduced if you set the location of the player to Europe. You can easily get around this by setting the location to USA or Rest of the World. It doesn't change any other functionality and everything is displayed in English - It just means that the maximum volume is a lot louder.
Tip 2 - 6 demo tracks are included on the Clip+. These don't show up in the music folder when you attach the device to your computer, but an easy way to delete them is to use the Format option under System Settings before you start putting your own music on there.
Tip 3 - You can download updated firmware for the player from Sandisk's site, although my Clip+ shipped with the latest firmware on it.
If you have a huge collection of music and you want to carry it around with you all the time, this player probably isn't for you, although you can still fit dozens of albums onto it. Similarly, if you like the auto-syncing feature offered by certain other players, then this might not be for you either. What it does do, it does extremely well, it's simple to use, small and light, and it sounds great with the right headphones, so at this price (less than 40 quid at the moment) I'm giving it a full 5 stars.