
I have a part bred Afghan, the other part is Saluki..
I got her after she was spayed so I have no idea if her coat is how it was when she was born or if its a result of her being spayed but she has a very soft fine wool type coat (think cashmere, not sheep!).
It mats VERY easily, but is totally manageable as her coat resembles much more the Afghans original coat than the modern show coat, (she has a natural broad saddle, very heavy coat on her ears and forelegs, belly and hind legs). I use a VERY heavy conditioner on her to keep it silky rather than wooly or fluffy and I strip some out of the thicker areas (her elbows are ridiculous!).
The correct Afghan coat should not be wooly - some are so pick your breeder wisely and get to know their lines. It is a very fine silk coat and does need care to keep it in a floor length style show-appropriate condition, that means weekly (or more frequent!) baths depending on time of year and where you walk. It might mean oiling the coat and careful use of all in one play suits..
If you want an afghan but don't want to show, its not so hard to keep them in a full coat but not show quality, ie, coat WILL break off as it contacts the ground and knots and the knots get removed, so the coat will look natural rather than trimmed, but won't be so long.
Still wants a lot of washing and drying because dirt will break the coat quickly and also a dirty dog is often an itchy dog, and an itchy dog makes mats in itself very fast!
Temperament wise.. extreme end of the sighthound scale, specialist nature - they don't suffer fools gladly - get heavy handed or in their opinion, unnecessarily harsh and you will know about it, they are SHARP and their feelings are easily hurt, their trust is easily broken.
Also not a breed that are easily let off the lead, which is something to consider - they CAN go off leash but you need a big secure space, as in several acres big, not a tennis court sized area! They are much more likely than other breeds to take notice of birds and squirrels as well as prey on the ground so you have to be super vigilant!