These figures are great representations of the classic charater designs. Colours are acurate and vibrant but the poses of Sonic, Knuckles and Tails are pretty dull. This is because they were the first three to be designed, so clearly more thought went into the poses of the last three.
As far as durability goes they're prefectly fine. Yes the arms and such could snap off but as the title states they're collectibles, not toys and are not meant to be bent or stressed too much. After all there are no points of articulation. I still give durability 5 stars because they hold up to regular handling.
Overall a great set of figures which are long overdue, the only downsides are some dull poses which cost it a star, but still a great buy.