nige1, on 2017-July-03, 13:00, said:
Just my guess at a likely layout consistent with the bidding and play.
Its not up to us to gripe about opponent's bidding and play...
IMO, their bidding was reasonable.
Although cashing ♣A seems a mistake
While I'm not inclined to agree that their bidding was reasonable, I have to admit that it is far more often that I learn from your posts than that I disagree with them.
On this hand, I think that (a) East should play in a black suit once West bids 3S (otherwise why bother bidding 3S at all and telling the defenders about your shape?), (b) West with a single short heart stopper and awful diamonds should retreat from notrump after East has shown a "black hand", and © after North leads the recommended ♥7 on your example hand. South should find the correct defense, making E-W pay for not reaching 4S.
Am I being unduly harsh? Probably. If any of my "advanced" students had the above auction with your hands, I would be satisfied. Somebody mentioned "good club players" so I'm assuming that means above student level. I would also think a student would lead the H3 and not return a diamond with the South hand after partner led the H7.