Thank you for the lead, checked out 1A Stoner and indeed it is cheap for such a prime location but the facade is an eyesores.

However can't find so cheap asking for MyHabitat (RM900psf) and Idaman Residence (RM800psf) 

Anyone holding units in KLCC area can advise whether the rental/ capital play viable?

U dont need a deep pocket to get a good unit in KLCC & under RM 1 million, i think any region within 1000-1500 is good enough... i dont see why KLCC area wont go RM5000-RM7000 psf in next 10 years, its just matter of time. Property investment is all about long term investment.
Imagine if you invested in a unit cost you RM1mil and you sold it off RM2mil after 5-10 years, that would be a very good profit.
How many people make RM1 mil in their whole life. 
Greater KL is still among the cheapest capital city in ASEAN, sooner or later it will definitely reach the RM5000psf mark.
Anyway, the highest price paid psf is over RM7000 if not mistaken. Rich people r not stupid, thats why they r rich, they will see thing further.
Good luck in your investment.

I think you can get tenant in KLCC
It just depends on what you offer the tenant in terms of
the type of furnishing and rental you are willing to accept.
I read in the Star paper a couple of months ago that people were moving back to the city because of the worsening traffic conditions so...
The property values in Mont Kiara,Bukit Bintang, Bangsar, Taman Tun have all been increasing whilst KLCC has been stagnant for a while. I think that KLCC should gravitate to the RM2000psf level soon to realign with the other areas. Bangsar at RM1000psf and Mont Kiara at RM850psf means KLCC should be at least RM1500-2000psf shouldn't it?

I believe some new launches have surpassed the RM2k psf mark. Banyan Tree, Ruma Residences etc. IMO smaller size apartments (less than 1k sf) will still do well around KLCC area. Rental should not be an issue. The upcoming supply of SOHO KL n service apartment will test the market. But long term wise, it should be fine.