PalmOne's new Tungsten T5 is visually all screen. The screen is vast: 3.7 diagonal inches and 320 x 480 pixels. It dominates the front of the casing. It is clear and bright too, and a strip of icons along its bottom edge (or along the right edge if you flip it into landscape format) offers access to key features like the flipping itself, Bluetooth and the Graffiti hand-writing recognition area which can be popped up and down as needed.

PalmOne has come up with plenty of innovations and many of them seem targeted at ease of use without taking anything away from the look and feel that existing users will find familiar. So, for example, you can start applications from the icon-based launcher as always, but can also set up a Favourites screen which provides access not only to applications but to documents and URLs too. To set up a Favourite (both adding new and editing existing) you tap the space it is to slot into and make your choices. Very easy. There are four pages of eight favourites each, so there's plenty of scope here.

There's a file manager too, at last, which puts a familiar visual interface on the contents of the device and allows you to perform move, copy, delete and beam functions with ease. Also on the ROM is some software we've seen before, like the excellent Blazer Web browser, VersaMail for e-mail and a potentially handy SMS tool for sending messages via your Bluetooth-connected mobile phone.

The headlines are screaming that this PDA has a massive 256MB of storage. Well yes, it does. But that's not quite what it seems. 41MB is set aside for the ROM and you don't have access to it. It's quite naughty of PalmOne to include this in its headline figure, as some people could think they get access to the lot.

The remainder divides into two sections: 55MB for applications and data (we had 53.9MB after a hard reset of our review device), and 160MB of what PalmOne calls 'internal flash drive' (of which we had 157.2MB available after that hard reset).

The idea is that you can use the flash area as you might a USB key drive, to transfer files between computers. But you can't run applications from it, and you need to go into 'Drive Mode' when you connect a PC to the Tungsten T5 to access it.

All the memory is non-volatile, by the way. That means if you suffer a complete battery drain, everything you've put onto the device will still be there when you recharge. Only a hard reset will get rid of it.

While Bluetooth is present in the Tungsten T5 there is no Wi-Fi. PalmOne representatives told us when they launched the device that Wi-Fi was left out to help keep the cost down. And PalmOne doesn't provide a sync cradle with the Tungsten T5, giving you a cable instead. If you are the type that likes to stand your PDA upright on a desk, you'll need to invest in a cradle separately.

Officially the Tungsten range is aimed at professional users, but there is a lot here that the general consumer will like too. The Tungsten T5 is definitely a move forward for PalmOne, and that internal flash drive memory may well appeal if you like or need to carry lots of data around. But the bottom line of 55MB of application memory and the lack of Wi-Fi may reduce the Tungsten T5's appeal somewhat.