I think a "plain" BOM has it's uses. While it shouldn't replace the original translation, it shouldn't be dismissed.
My cousin was baptized last year. Though he is 46, his mental capacity is that of a 12 or 13 yr old. He also has several learning disabilities. While he was living with me, w read the scriptures together daily. However, unless I went over each verse again in modern english, he couldn't understand anything.
I actually found the website mentioned, and started reading it with him. Though he still forgot what was read after awhile, he was able to go back and read from the website again to refresh his memory. It was such a blessing to see him read and understand and actually learn.
There are some people who simply cannot understand the original translation. No amount of reading it will change that. For them, this kind of modern translation is invaluable. Everyone should have access to the Scriptures at a level that they can understand. Just my opinion