I think Ellen is one of the most excellent realtors out there in Stockholm and I think I have the facts to back this up.
When me and my ex interviewed several realtors, Ellen stood out as a clear winner. She was very professional, realistic, and rational about her evaluation and goals but motivated at the same time. No unrealistic claims to lure us into signing a contract with her. She made an evaluation which she set her goal based on and later did a great job reaching it.
Through out the process, she supported us very well with tips about decoration, etc. She also helped us with evaluating many potential apartments we wanted to buy. Even after she sold our apartment and I bought mine (from another realtor). She helped me with a brilliant idea about renovation of my new apartment than no one else told me before, and patiently answered my endless questions all for free!
But her most important feature is a rare quality that separates her from most of other realtors. She is not doing this only for commission. She really has a genuine sympathy for the happiness and satisfaction of parties involved. This I found out at our farewell conversation in her sense of deep relief when she found out we are all happy. I am sure she will become a very famous realtor some day and rightly so!