This is the major warranty claims issues on grey imported set from US reported in local Lenovo facebook as quoted below. Pity her got the bad apple and experience the major warranty claims issues. 

So, please be very careful and don't get poison by those good deals of the grey imported set (AP set) from US.  
It will save your hassle and headace during warranty claims.    

For those who owned the AP set, pray hard that you are lucky and nothing go wrong with your lappy. 

Lenovo Malaysia:
"Hi Ms Radhika, sorry for the delay. I have intended to contact you as soon I was able to speak to the reseller who sold you the U300 but was unable to since their number was not reachable, however, in the process, dialled your brother's number which was written in the purchase invoice (thinking it could be the salesman's contact number) and I have spoken to him with regards to the management disposition on this case.

Lenovo management has decided that we will not be able to support your request for a replacement or refund because this machine is a US based machine. The dealer who sold you the unit is not an authorized Lenovo reseller. I have tried to contact the reseller but to no avail, in order to advise them the situation and for them to liase with you with regards to the solution that they may be able to offer you. I suggest that you walk in to the reseller's office if you also fail to reach them via telephone and bring up this issue to them.

Although Lenovo is an international company, the services that we render is subjected to the company's local policy and at the same time governed by Lenovo International Term & Condition.

For your existing U300 which are still at our service center, we will finish up the repair but there won't be any more warranty repair should any issue surfaces after this. "
http://www.facebook.com/LenovoMY

Seller doesn't have original receipt for the laptops she purchased.

I bought 2 units from the seller above. One broke down in 18 days.

She told me to sent it in for warranty despite I want a replacement from her.

Nevermind , I agreed with her. Now Lenovo did not fix anything and sent me back a faulty unit. This part is not her fault.

But IBM Service Center offered me a chance of a replacement unit. However, they needed the official receipt.

I contacted fie. She replied me that she doesn't have any official receipt.

Laptop buyers beware. I just want to state to you all what I have gone through for 1 month.

She will try to reassured you but words are just words, she just does nothing and is only INTERESTED IN UR MONEY.

my word of advice to all of u , get from a store which has the official receipt.

preparing one~~

Finally, flash modded bios and overlock my gpu 1100/2200 :3

Now can change some good wifi cards replace this atheros~