When you are associated with the person of this sign, you will feel that both of you have many lessons to learn from the other. Both of you will feel the weakness and mistakes of the other person, strongly understand each others behavior. But please note if the other planets, moon and Ascendant of the two horoscopes can change the description of relationships given above. But will not basically change the foundation of 2-12 sun sign compatibility.
But if other planets between the two horoscopes especially the moon (moon denotes your inner feelings) and the ascendants are having good relations is an intense than Devotion, loyalty and respect will be there between both of you. If ascendants and moon of two horoscopes are in unfavorable axis than your relationships will be tense and difficult indeed.
So just checking your Compatibilities by only sun sign pattern is not full-proof system of match making. So it is better to get your horoscope matched by a qualified astrologer.