I'm very satisfied
I've been using an invisible hhkb for a very long time. I applied a new key cap. I like the color. There are no letters on the side of the key cap, so it should be worked separately. It is slightly higher than the original key cap. It's not 100% perfect, but I think it's about 95%. If the price was a little cheaper, I think I could change the key cap often. The key cap of the hhkb can be stored in the case included in the product I purchased.