We have stayed in the apartment 4 times and again in Feb from the 9th for a week. The apartments are ahem on the piste so again ahem ski in and ski out (HE HE) so you can ahem ski down you Studenets 1 lift which will take you to the mid station.
Size wise they vary. Ours is one bedroom and is big enough for four of us.
my parents have an apartment in castle 1 top floor, im also going out there on the 8th-13th hopefully we will get some snow ! *fingers crossed* if not then drink away