Under the hood of the Lenovo IdeaPad U300S is an Intel Core i5 processor, which we were slightly disappointed to see, when other manufacturers have managed to add Intel Core i7 processors to a smaller, lighter chassis.
The processor is one of Intel's low-voltage chips, which balances power with decent battery life and enables system builders to keep their laptops svelte, and achieve the standard required for ultrabook branding.
The low voltage family of processors are part of Intel's Sandy Bridge range, but don't expect the same performance as on full laptop systems such as the Dell XPS 15z. These processors are clocked at a meagre 1.6GHz, but have some cunning tech built in to keep the system optimised.
There's Intel's fast booting technology, which enables the Lenovo to resume from sleep and boot from cold in seconds, and makes a huge difference. It's one of the best ultrabook features, but it's not exclusive to the Lenovo.
We have seen better processors elsewhere, such as the Asus Zenbook with its Intel Core i7 processor, and this affects performance.
There's also 4GB of RAM, which is standard across all ultrabooks and provides enough memory for keeping the system feeling responsive.
Finally, there's a 128GB SSD drive, which we're glad to say is becoming standard on ultrabooks, but whether you can live on that is debatable. Yes, you can employ an external HDD, but the question for many is whether an ultrabook can function as a primary machine, or whether it must be complemented by a full-form computer.
The lack of connections on the Lenovo IdeaPad U300S means using this as a primary laptop is difficult, which is a bugbear.
While the whole world goes wireless, and we start to store data in the cloud, 128GB of storage seems plenty. Cloud apps and storage are taking the strain off disc drives, but connectivity is the problem. The Lenovo IdeaPad U300S features just two USB ports, one of these being USB 3.0, and an HDMI port but no Ethernet or VGA.
The Lenovo IdeaPad U300S is also the only ultrabook not to feature a media card slot, and with only two USB slots on offer, connectivity is severely limited.
The result is that it's harder to get online, and we found it frustrating when hopping between offices and meeting rooms when wireless signal was poor, or non-existent. That's not a problem for home users, but with the matt screen and less attractive lines, we feel this ultrabook is aimed at mobile workers.
The Lenovo IdeaPad U300S features a 13.3-inch display, and in a nod to true portability, the screen is matt, with a coating to stop reflections in direct sunlight.
Matt screens tend to polarise opinion, with many complaining that it makes the panel dull and lifeless, versus others who love the ability to work outside and near windows with them.
The truth is that both of these statements are true, and the Lenovo is totally unsuitable for those who want to enjoy movies and pictures, but it's a great choice for people who want to work on the move.