Eelke's place is LOVELY. I was warmly welcomed by Eelke and his girlfriend. Got a quick tour of the apartment and some Dutch treats. I stayed at Eelke's place for a month for work--great internet connection except for one day, but Eelke was available to help fix it immediately. Amenities like dishwasher and washing machine were very convenient. It had everything for a comfortable stay (including floor heating which was great during the cold days).
Located in the Dapper neighbourhood which has lots of cafés and places to eat. Everything you need is within a 5-minute walk: supermarkets, organic food shop, drugstores, market (everyday but Sunday), etc. Oosterpark is also really close, great for walks--or even skating during winter. Only a 10-minute bike ride to the city centre or 25-30 minute walk (a nice walk via Artis zoo, and Hortus the botanical garden).
In short, Eelke was a very nice host and his place was very comfortable.
Absolutely recommend it both for long and short stays.