Letting agents websites research

I have added a few websites that i have researched feel free to have a look and let me know what you think to investigating these.

http://www.sd-properties.co.uk/

http://www.westone-student-accommodation-sheffield.co.uk/

http://www.unite-students.com/student-accommodation-sheffield?_$ja=kw:Sheffield%7Ccgn:Unite+Sitelinks%7Ccgid:1176319872%7Ctsid:6774%7Ccn:Brand+-+Unite%7C&gclid=COypuZr3laACFRQulAodghjndw