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I have had the Acer Aspire 4810TZ for over a month now and so feel qualified to do it justice in a review.
Firstly the Timeline series is marketed as a lightweight, compact, long battery life laptop. An oversized notebook basically! This particular laptop weighs in at just less than 2kg, at this weight I find it easy to carry for long distances without straining my arms. It has a 14" screen which I find quite adequate - even for design work and watching movies. It is also an ideal size for fitting onto train tables that pull down from the seat in front. Quite simple to carry around too as it is not too large, and fits under your arm snuggly for short distances due to it being less than an inch thick. Although as it is a less popular screen size there are less laptop cases and protectors than for a standard sizes, but unless you're fussy about designs or colours it is no issue finding a carry bag, all I'm saying is that the range of choice is greatly reduced. They advertise that the battery will last 8+ hours, I generally find that it last closer to 6, and this is running without much power saving. Also importantly the battery life has not diminished with use, and generally I can charge for just over half an hours for around 100% charge. Another handy note about the battery is that it is situated along the hinge of the laptop, meaning that when using on the knee, or uneven surface, it balances quite nicely and comfortably to use. I'm glad I choose to buy this instead of a notebook as I find it just as portable, the battery life competes well, it has a DVD-RW which a notebook would not, the keyboard and screen are more user friendly and the performance is far better.
Now onto the performance: ( I'm not terribly technically minded, but I shall try my best to speak the lingo and convey what the usability is like). The 3GB of Ram makes the laptop a very snappy responder, only having to click an icon once (such as opening documents) and it appears almost instantly. Even after installing quite a lot of junk the response time barely leaves you time to blink! I have also found this amount of Ram makes running photo editing and design software, such as Gimp 2 and Adobe Photoshop a doddle with little wait time for transformations and undo actions. Equally it runs games (WoW, Sims3 etc.) perfectly smoothly, although always still check the back of the game boxes before making any purchases and check against the laptop spec. The screen is 14" as I discussed before, it is LED HD, and to look at the picture is perfectly clear and bright. Movies, games and photos all look good. One thing to bear in mind though is as it has a long battery life the processor isn't all that fast - 1.3 GHz. Although I have never come across any sizable issue in this department I have noticed it can take a little time longer to un .rar or .zip files than it would on my desktop pc. I believe the graphics card is integrated (My computer says it is an 'Mobile Intel 4 Series Express Chipset Family), which if I'm being perfectly honest have no idea what it means, all I know is that I have had no issues getting it to run games (on the lower settings) and photo editing software. The 250GB Hard Drive is of ample size to most, but bear in mind only 220GB is actual usable space after Windows and basic running software is installed.
Windows 7 Home Premium is ready installed. Although I would recommend checking the computers installed programs before really starting to use it as there is a lot a junk ready installed, such as 2 anti-viruses (which I found a little strange as they could potentially clash and leave the computer vulnerable), so uninstall things that you don't want to free up some space and stop all those annoying start-up pop-ups.
The track pad I find easy to use, and there are several short-cut symbols you can use - such as drag two fingers down to move the page down, which makes things much quicker. The keypad is comfortable to use, feels nice and the keys are easy to find when typing quick.
So far I have had no issues with my laptop and would recommend it to anyone wanting a more portable machine, and would definitely recommend any one looking at notebooks to consider their different options. I am certainly glad I did!