Yes I "double confirm' that they are able to give one of the best rates, I'm their customer too. 1 or 2 other money changers on the same floor(2nd floor) are able to give comparable rates or even 10 cents higher sometimes. It depends on the exact time when they bought their money to keep as their stock, exchange rate fluctuates every seconds. So maybe Money Matters display a better rate today, another money changer might display a better rate tomorrow. The key is to compare the displayed rates on 2nd floor of Arcade, don't waste your time going to 1st floor as their rates are lousier as they operate like retailers rather than wholesalers. All the most competitive rates are on 2nd floor.
I can say that Arcade provides one of the best rates in Singapore. I've went to Parkway once and with the rate they offered, I'll be getting RM420 lesser as I called Arcade to compare rates. I asked them whether they can meet Arcade's rate but they said they were unable to. They counter offered me their best rate but still RM100 lesser than Arcade. I thought it was not worth the trouble to drive to Arcade just for another Rm100, thus I just took their offer.
Where ever you guys go to exchange Ringgit next time, just call Money Matters at the number stated by Jogs1 above to compare the rate and remember to post your comparison here so as to benefit every reader. When you call, ask for Aneen or Anvar so that they will think that you are their big time regular customer who has their business card