I'm an American so being unfamiliar with Malaysia i didnt quite know what to expect of hotels in Malaysia. I stayed in room 603 from the middle of august to about a week or so ago.
From what i saw and experienced, this is the best, cleanest, highest class hotel i have ever been in, in my life. I stayed briefly in other hotels like Cosmo Hotel in KL centre or 5 senses or other 4 or 5 star hotels near Kuala Lumpur.
None of them can compare with double tree in shah Alam. All the other hotels had a mold smell or were unlivable (especially cosmo hotel - which was frankly a terrible experience). The Saujana Hotel was the only other hotel that seemed almost on par but still had a mold mildew smell present.
However shah alam doubletree by hilton was in comparison extremely clean, zero mold smell or mildew issues, excellent staff service even in AM hours, a luxurious lobby and restaurant, courteous and helpful staff and managers - essentially a 5 star hotel experience straight from top tier professionals likely trained in switzerland , but in Malayasia.
The only downside of double tree in shah Alam was the distance from KL proper, but it is still the best hotel in my opinion, in Malaysia around KL