Well i have never actually heard of Advent before,and i tend to buy brand name items when it comes to expensive stuff like a laptop,Plus it's refurbished.
Also,I Have to say toshiba's customer service is great! Unfortunately i have had to get my laptop repaired due to a power supply problem (2 months old) Which is bad,but when i rang them up they organized a courier to pick it up and everything! Plus i was speaking to australians,Not indians! (No Offence implied)!
But i still recomend the toshiba from personal experience with different toshiba laptops.
I Recently got rid of a 23 year old laptop,Running windows 3.1,black and white screen it worked PERFECTLY Except for the floppy drive and it was a toshiba,back in my n00b days i had a few toshiba laptops and i put them through HELL and they all worked fine!
So,Props to toshiba
Although i have heard of some members having toshiba laptops and different problems going wrong with them,so all i can say is do your research (Google reviews and such) when buying/choosing a laptop.