As with recent TomTom ONEs, the EasyPort screen attachment is built into the device itself, making it twice as thick. However, you can still quite easily slip the whole thing in a jacket pocket, fulfilling TomTom's aim of making a device for occasional use in multiple vehicles, although you still have to carry the power cable if you want more than a couple of hours of use. The mount does actually come off, but in nowhere near as elegant a fashion as the system used by TomTom's x40 series devices.
In use, the ONE IQ Routes is as capable as other TomToms we've tested. The map view is essentially the same, only smaller due to the ONE having a 3.5in screen with a 4:3 format. A host of information is packed into the bottom of the screen; in fact everything you probably want to know about your journey, including both current time and time to destination, plus an unobtrusive display of current speed compared to the prevailing speed limit. Turnings are displayed clearly and in plenty of time, with easily understood verbal commands. The speaker volume can also be linked to car speed, so commands get loader as you go faster.
The TomTom ONE IQ Routes is not quite a budget model, and the version we looked at was the £20 more expensive Europe 42 model, which covers all of Western Europe and major roads in many Eastern European countries as well. If you're just after cheap sat-nav for Continental journeys, Navigon's 1210 remains the best-value option around, and Navman's S30 3D is the best value for UK-only travelling. In contrast, TomTom's ONE IQ Routes sits in a slightly less obvious slot above the entry-level. But if you travel enough to want the extra journey time savings IQ Routes offers, but not enough for a premium sat-nav, it's worth considering.