I have not stayed in the Nana Hotel for over tens years now for obvious reasons its a dump. I reccommend that very Bangkok newbie stay there you can not beat its location. It was my first mongering Hotel in Bangkok reccommend by faceless BM members.
I personally Like staying in the Nana area, close to everything I like. Last time stay at Dynasty grande big rooms small pool and had fitness room.
I wouldn't mind checking out the Aspen Suites next time I'm in bangkok I thought judging from the location maps on the internet it was far down soi 2 maybe a 20 minute walk to nana but majorAdamHenry stated it was only 4 minite walk to Nana. I dont know but I know that Majestic grande on Soi 2 is about five minutes walk to nana and last time I was there I didnt see any sign of the Aspen Suites.
I will have to investigate it.