I've had really good luck with the confer pool curve steps ( just the steps not the side piece). They have been very sturdy and comfortable to use. I'm not a small person and they feel very solid getting in and out of the pool.
Another vote for Confer here.
I have the A frame ladder, once deck was built I ordered a adapter kit and cut the back legs off and mounted to deck.Another brand I have still in box cant remember name, will not use, way to flimsy looking.
The Confer ones seem to be 2x strength,especially when it comes to the step treads.