It all depends on what you want to spend. There are many Marriotts in the London area and some cheaper ones out by Heathrow Airport (where you would either take the tube or train in). Our favorate hotel in London is the Renaissance London Chancery Court Hotel. It is within 1/2 block of the Holborn Tube Station on the Picadilly Line and the rooms are very nice. We have also stayed at the Marriott Kensington, which is about 3 blocks from the Kensington Tube station. I have heard that the Marriott Hotel Country Hall was nice and it is right by Westminster, Big Ben and the London Eye. You will find that all the Marriott hotels in London are expensive - so if you have points I would use them! Good Luck.
Totally agree with the previous post. Our favorite hotel is Grosvenor House on Park Lane -- has some wonderful history. Being in the West End of London it is close to Regent Street, Oxford Street etc for shopping and equally a short walk to Pall Mall, Buckingham Palace and across the road from Hyde Park. Also agree that for those paying with US$'s all London hotels can be expensive so points is a good option to keep the cost down a little.
I have stayed at both the County Hall (three times), which is right next to the London Eye and above the Aquarium and across from Westminster Hall -- the location is superb. I've also stayed at the Renaissance Chancery Court and it was lovely -- it is more in the financial district, so quiet on the weekends, but it's not far from the British Museum. I'll also be staying at West India Quay in December and can report back -- but that is significantly away from the main sites. As the previous two respondents have said, nothing is cheap in London, in itself and because of the dollar. If you have points for a stay you might consider using them. ProfChiara
If you are looking to save points and dont mind a few extra minutes on the tube (subway), check out the Marriott Maida-Vale. Its a great property, fewer points than the hotels in the "circle route" but is still very accessible with only an extra 10-15mins on the subway on average. https://www.marriott.com/hotels/travel/lonwh-london-marriott-hotel-maida-vale/ Another one to look at is the Marriott West India Quay. Its a 5min train ride to the Tower of London /Tower Bridge and from there its an easy walk/tube ride to most any of the "touristy" places. This hotel is in a business park area so its quiet at night and is actually in a pretty cool part of the city. https://www.marriott.com/hotels/travel/loncw-london-marriott-hotel-west-india-quay/ Both are CAT 6 = 30k points a night vs CAT 7/8 (35/40k /night). If you are looking to save 10-20k points, then these are two places I would definitely recommend looking into.
I have one other point to make. We never use Marriott Hotel points unless we get a travel package. It's the best use of your points. The fewer nights you stay, the more points you pay per night. Divide the number of points by the number of nights and you will see. Also, try assigning a penny a point to get a feel for the cost of the room! [100,000 points = $1,000]. Actually, if you are a vacation timeshare owner you are paying more than a penny a point. Marriott really has this all figured out so try not to waste your money. To me, points are really dollars! Good luck to you!
I would say that County Hall is a great location, however, for less points, the MArble Arch is only about 5 blocks to Hyde Park and then further into Kensington Gardens, and a 5 block walk to an Underground stop that will get you anywhere fast. They have a great concierge level, an indoor pool and fitness center, and for the price, it is a good value(rooms are small, but you won't be in them long). Plus, we walked everywhere, not needing the Underground, if you like to walk. We have also stayed in Maida-Valie, but that was 10 years ago, and I thought it was in a not so good area, and a much longer subway ride(plus, it has had a recent post that says it is run down...it doesn't surprise me). And we have also stayed at the Marriott close to Regent's park, which a nice and small, but a nice walk to Regent's Park. I would say that if you stay anywhere in London within the Marble Arch Marriott, you will be very happy. Have a wonderful time!