 This system is greatly favorable to regional parties, i.e.parties that gain their votes in a single electorate (see IDS, HDSSB), and it is disfavorable to parties that have greater numbers but are widespread throughout the nation (see HSU and HSP).This made also the forming of post-electoral coalitions somewhat unpredictable, as the overall success of one of the greatest parties can effectively turn out to be counterproductive if it is achieved at the expense of their foreseeable partner, causing them to not pass the threshold in some or all electorates (it happened to the HDZ-led coalition in previous 2003 election).