The straps on the inside are great

The case fits both boards wonderfully and the straps hold it in place and protect the keys and buttons so that you can stack them without worrying about damage.

I bought another brand of case that was supposed to be for a 61 key case and did not fit my Casio CTK6000, but it pretty much swims in this one, which makes the velcro straps very important to secure the unit inside the case

I can also see how this would adequately hold a keyboard also with the nice securing straps inside (which was a major decision factor for us).

I love the straps on the inside, and the padding is really perfect.

I love the padded straps which help to further protect the top of the keyboard.

I like the internal straps so that stuff doesn't just drop to the bottom when it is tipped upright.

This case fits my Yamaha P-105 like a glove