Commuting to london :S

Yep, it's me, asking for advice again
.
So...I was just wondering if anyone has been a regular commuter to London before and am trying to suss out how bad it is? I would also like some advice on a job I've been offered if you'd be so kind, this is my position:
I live in Guildford and have been offered a job in London. Now, the position is pretty crap to start with, it's bascially and office/admin assistant come oddjob, but what sells it is the opportunities it may lead to. The company is called Vector Foiltec (http://www.vector-foiltec.com/vector.htm) and is a pretty unique construction company who, amongst many other things, were responsible for the Eden Project. The company is growing rapidly (office has quadroupled in size in 3yrs) and they actively seek young people (moi) and help them develop their skills/talents. The office also seems like a pretty chilled out place to work (looks great too) and everyone pretty young and down to earth. The pay is £17.5k/yr.
Those are the good bits. It took me 1.5hrs to get from my house to the office on the day of my interview, so I'd be getting up around 5.30-6 every morning and getting in at about 8 at night (hrs:9-6). This is taking up a good chunk of my spare time in the day and would also completely mess up my running (4x/week)(which is quite important to me). This would also cause other problems like limiting my (amazing
) social life etc etc. Also, the long day and stressful commute would no doubt be absolutely shattering! Another thing is that the commute would cost about £4k a year meaning a not-so-great £13.5k salary.
Is commuting to London as bad as I hear? Do you think taking the position would be worth it?
Thanks folks! I really appreciate everyone on the forum being so kind and helping me out!
...J...

So...I was just wondering if anyone has been a regular commuter to London before and am trying to suss out how bad it is? I would also like some advice on a job I've been offered if you'd be so kind, this is my position:
I live in Guildford and have been offered a job in London. Now, the position is pretty crap to start with, it's bascially and office/admin assistant come oddjob, but what sells it is the opportunities it may lead to. The company is called Vector Foiltec (http://www.vector-foiltec.com/vector.htm) and is a pretty unique construction company who, amongst many other things, were responsible for the Eden Project. The company is growing rapidly (office has quadroupled in size in 3yrs) and they actively seek young people (moi) and help them develop their skills/talents. The office also seems like a pretty chilled out place to work (looks great too) and everyone pretty young and down to earth. The pay is £17.5k/yr.
Those are the good bits. It took me 1.5hrs to get from my house to the office on the day of my interview, so I'd be getting up around 5.30-6 every morning and getting in at about 8 at night (hrs:9-6). This is taking up a good chunk of my spare time in the day and would also completely mess up my running (4x/week)(which is quite important to me). This would also cause other problems like limiting my (amazing

Is commuting to London as bad as I hear? Do you think taking the position would be worth it?
Thanks folks! I really appreciate everyone on the forum being so kind and helping me out!
...J...