The view of the Secret Lagoon is just magical! It is very peaceful, beautiful, and simply great to admire as you look upwards, sinking your ears into the water and flapping your arms to stay afloat. While we were there, there was one orange flower just above the entrance to the Secret Lagoon, and that was beautiful as well!
As far as accessibility is concerned, I would not recommend solo travelers, seniors, PWDs, pregnant, or mothers with babies to go especially when the water is high enough. At the entrance, the water has a strong push. If pushed upwards, you needs to watch your head. And below the water are some rocks that you can bang your legs and feet against. You can still be careful but once the water pushes you, you have no choice but to go with it. Our guide got us through by having us lay on our backs, and he would float us right through with experienced timing. Our mother with a baby ended up staying at the beach with a cover until we were done inside.
If you get thirsty, you can always buy fresh coconut juice from the friendly men on the little boats. They will charge you for them when you get back to your main boat. It is about P100/buko during our visit. Sounds pricey but this money can help them a lot! They are even supportive to those who can't really swim, because they can paddle you back to your main boat if you need help or feel tired fighting against the current.
I also suggest waterproofing your mobile phones so you can capture pretty photos inside. I should have done this, actually.