We were pleased to stay in ApartDirect, an absolutely lovely place in a very nice neighborhood!
What is very comfy, is that apartment has everything you need - kitchen supplies, bedclothes, bathroom stuff.
And the location is very nice - the transport is comfortable, it took us abt 30min to reach Gamla Stan. We were using tram & subway, and with 72hours ticket absolutely recoup the money.
The thing that you are not tied in time with checking in - you just arrive any time you want after the set time, enter the code and enjoy! And the same with checking out.
The easy-to-use storage room was very helpful!