just had a chance to check that URL. they look nice, and they're certainly centrally located, and the amenities of having an apartment whilst travelling can't be beat, but you are paying hotel room rates. if price is an issue, and you don't mind being so central, and have a desire to live less like a tourist and experience a bit more of Amsterdam than Dam Sq/ Warmoestraat/ etc., we can recommend that you check out
www.citymundo.com ---a large variety of very nice apartments are available all over town, and prices are generally 1/2 of what you're looking at here. its a preferred option if you're staying for more than a couple of days, and infinately preferable to what you could expect at hotels in the range of 95-
keep in mind that getting around this compact town is quite simple, easy and fast, and you're never more than a pleasant 15-20 mins walk from the centrum---faster if you use the trams----and lots faster if you bicycle.