is inconsistent and very bad, letting B capture the previous cutting stone with a ponnuki. If W does not like the prospects of a fight, he should not cut in the first place. W could also consider cutting at E6 (but not E5) instead of G5 at move 20. After the ponnuki, B is definitely in the lead.Let's evaluate the board position after move 24. What are the important features?
- B has massive thickness from the ponnuki, so the two W stones on the lower side look pretty weak. W really wants to slide to Q2, to live with good shape and territory. Compare that to a B move at P2, undercutting the W shape. The difference is enormous.
The B stone at D6 has been greatly weakened and is now the least valuable stone on the board. It still has lots of aji, but its best use is probably to slow W development. B should treat this stone lightly.
For these reasons,
seems to me like an overplay. Locally, jumping lightly to D8 would be better. Then, if W wedges, B connects on the outside and gladly lets W capture one stone. Globally, P2 or P3 look like the vital move, making maximum use of the B ponnuki. Other big moves like C14 or F16 or Q14 or R9 are less vital but still larger than the actual B move. After move 30, W is back in the game, with good fighting chances. Are the three B stones at D8 an asset or a liability?In the middle game fighting, B had several groups to chase, but played some moves which look slack to me:
(H15), 
(J8), 
(L8). These moves are all nice shape, but they do not really accomplish much. Assuming W lives in the center, these moves can easily become dame. In contrast, 
(P2) was a perfect attacking move, making real territory while attacking. (Unfortunately 
was a blunder, throwing away the attack.)In the endgame, both players ignored some very big plays for a long time. W won the game by eventually getting almost all of the important yose moves: E2, S7, P1, K18, S14. Replaying the endgame as B would be a good exercise, to see how much the score would change with better play.
is not a good place to evaluate the position, because the floating 
stones are unstable. Much will depend upon how well Black attacks them and White defends them. Since White has sente, things look good for White. Instead of taking the White stone, Black should probably attack the floating stones; at "a", for instance.
is a useless threat. Black can attack with something like 
. Then if 
Black has a ladder.
White has taken the lead.