Motorola's music phones have never really been the last word, but there has been an evolutionary arc of sorts, with a pretty consistent range of improvements from the E1 to the latest ROKR E8.

But as is often the case, with one hand Motorola giveth, and with the other they taketh away.

Ultra slim design

First, the giveth. It looks pretty cool, in an moody kind of all-black way. It's thin, at 11mm but perhaps a bit unnecessarily wide at 53mm. In repose it's a glossy black monolith, distinguished only by the batwing logo at the top and the navigational FastScroll touch arc, of which more later.

Rub your thumb across the front though and the backlit keypad springs to life with soft keys, shortcuts for music and return, plus call start and end. This layout changes depending on which mode you're in – phone, music player or camera – offering dedicated buttons for each.

In use, each of the touch-sensitive keys has a tiny central bump to help your thumbs find the optimum pressure point. Pressing the keys gives a short haptic buzz so you know you've pressed them, and just inside the FastScroll arc is a hidden four-point D-pad which offers four shortcuts from the home menu – contacts, messages, Bluetooth and Google.

The slider on the side acts as the power button and also locks the keypad to avoid accidental in-pocket button presses.

FastScroll - friend or foe?

The FastScroll navigation arc is certainly eye-catching. There's nothing else that looks like it, though its functionality is clearly inspired by the iPod. It dominates the front of the handset, squeezing the 2in screen up to the top and offering a silver line arc when the rest of the keypad is hidden.

In practise though it's not that easy to use and we found ourselves consistently over-flicking on our way through the menus.

There's also that non-intuitive gap as your thumb describes a circle, so the cursor pauses on the missing bit of the ring.

Some of the menus feature a carousel layout of icons but others require you to use the D-pad just inside the arc, and we found this is just too close to the call start and end buttons, which led to a few problems too.

The bottom line is that the system looks great, but doesn't measure up to expectations.

Plenty of storage

Pressing the music shortcut key offers a completely different view of the E8.

The numeric keypad vanishes to be replaced by a set of backlit music player controls, including shuffle and repeat. The rather pokey screen meanwhile shows track details and cover art if there's any available.

Copying tracks by dragging and dropping from your computer via the USB connection is straightforward enough and there's a fairly decent 2GB of storage on board which can be beefed up with a 4GB MicroSD card (not supplied), though you'll have to remove the battery to install it.

Handy radio

Usefully, there's 3.5mm jack plug so you can use your own headphones but Motorola has made a bit of a meal of it by having it stand proud of the case, plum in the centre at the top, and covered by a gromit.

Just as well it's there though since the supplied headphones, as is the norm, aren't great, sounding a bit too 'shut-in' and compressed, with an unpleasant tendency towards sibilance. It's nice to know it's easy to upgrade them to a better wired pair or even a wireless stereo Bluetooth type.