I didn't stay at the hotel, but I went to the Spa 3 times while I was in Jakarta for my 3 months stay. The first two experience were very good. I was put in a couple's room because I went there with my husband. The couple room has a private jacuzzy, swimming pool and shower. The third experience was horrible. Since I went alone this time, I was booked in single room that shares public facilities with the locker room. The locker room is very nice. It has a lounging area, shower stalls, hot and cold jacuzzis, and complete amenities. Unfortunately, the treatment room was so loud with the sound of broken plumbing. Although the staff tried to accomodate me to a different room, but the noise was still present. It wasn't a pleasant and relaxing feeling. After finishing with the treatment, I was going to relax in the public Ladies' locker room. While I was going to the shower (half naked), there were two boys in the age around 4-8 year olds riding mini bikes with their two baby sitters!! They were loud and the nannies kept chasing them down. The mother was oblivious about this. So I complained the the front desk about this. I've paid to get nice relaxing time and treatment, and the management should've reviewed its policy regarding the minor or children (opossite sex) entering the locker faciliy. The manager's comments? "The mothers are usually don't know where to put the children, therefore they need to bring them inside the locker room!" For what I can see is, there were two nannies and a nice garden outside the spa facilities....I was very dissapointed with the non-challant management attitude.

The Ritz Carlton Club lounge makes all the difference in my stay. There is free wireless internet access, comfortable seating areas, and food all day long. The buffet, although not elaborate, serves quality food. Travelling alone, I have no intention of eating outside the hotel, and the club lounge gives me no reason to dine in the hotel restaurants as I'd rather have dinner while curling up in a sofa with my laptop beside me. The service in the club lounge is also excellent, thanks to Ms Lim the manager and her team. The same quality of service cannot be said for in-room housekeeping. I can't understand why they don't replace with clean plate / napkin/ cutlery after I have used them, and I don't consistently get all the supplies every day, e.g. tall glass for water, some of the toiletries, but that can be handled by a call to housekeeping.
As one would expect, the size and layout of the room are great. I also hear that guests of Ritz Carlton and dine in Marriott, which is just next door, and charge the bill to the room because they are run by the same company.

I stayed at the Ritz-Carlton Jakarta for two nights (Oct 23-24). I was throughly impressed with the facilities and the service. I stayed at the concierge level, who remembered my name every time I came back. I found the room to be of superb quality. The breakfast on the top floor was impeccable. I did not have a chance to try any of the restaurants in the hotel though. Would certainly stay again here if I visit again.

I stayed at the Ritz Carlton for 4 nights on a business trip.
For this purpose, the hotel was very good. Excellent facilities, good bars & restaurants, very large, comfortable room with fabulous bathroom and 42" plasma TV, good service and a high level of security (you have no idea how high unless you've been to Jakarta). As with most very large hotels, it had that strange feeling of anonymity but, for a business trip, that's OK.
What I'm looking for on this type of trip is comfort, facilities and reliability when I've just got off a 13 hour flight. The Ritz Carlton had all of those things.
Check-in was a bit vague and slow - not ideal at a 5-star hotel with an important VIP guest in tow, but we got there in the end and it all worked out. Paying for the business centre services (to print out boarding passes) was also a little off at this type of hotel, but still not the end of the world.
The restaurants and bars were good, important in Jakarta when it's not advisable to leave the hotel, and the buffet restaurant was very good. Ice cream teppan-yakki? Yep...
For me, this doesn't match up to true 5-star accomodation in Europe or the US in terms of the little, inconsequential things that make those hotels worth the extra, but for all the things that matter, it was top notch.
When I return to Jakarta, this is where I'll stay.