I bought my 15 inch MacBook Pro around 18 months ago and I haven't regretted it for a second. I had always used windows computers and was fed up of getting viruses (even when using anti virus software) so when my toshiba laptop had it's hard drive wiped by a virus I decided to make the investment and buy a Mac. I was a little nervous about spending so much money on a laptop when I could pick up another windows laptop for around £200-£300 but I'd heard nothing but good reviews about the MacBook pro so I went ahead.
I bought it just after christmas and I will say that I was a little bit disappointed as apple seemed to be the only company who weren't offering any kind of discount in the January sale.
I went for the most basic 15 inch as I only use my laptop enough to justify spending the extra money on a more advanced version.

Appearance
It has a very sleek modern appearance, a thin silver shell with a light up apple of the front. The keys are black with white letters/symbols and there is an option to light up the keyboard which is handy if you are in a dark room. The touch pad is quite large which is an advantage and it is also very sensitive, so it always does exactly what you want it to the first time (I have previously had laptops with a touch pad that you have to make several attempts and press very hard for it to work). The keyboard is very easy to type on. The keys are well spread out so you do not accidentally hit 2 keys at the same time. I did find it slightly difficult to get used to the American layout but now it's second nature.

Performance
Brilliant sound and picture quality. Easy to use. Fast. Haven't had any viruses yet and don't even have any anti-virus software so I'm very impressed.
Battery lasts for around 4 or 5 hours when not in charge which is great.

I really don't have anything bad to say about this laptop.

I have the iPhone 3GS and they work so well together, I sync all of my contacts, music, photos and calendars very quickly and easily.

If you are having the same windows or apple thoughts as I had then I would definitely recommend you go for apple. I will never go back to using a windows PC.