Not reading with the Shadowscapes I can't advice you about the usability of the meanings.
But as they have been written by the artist I would say they are worth getting them.
I find the meanings very well written.
But having the companion book as well as the amazing and beautifull two books edition called The Art of the Shadowscape Tarot, I can give you the strong advice, if you can afford them, to get these two books.
1. It has been often criticized that the cards are too small for the very detailled pictures.
In the two books I mention all the cards are reproduced at 26,5 x 16 cm!
This is a really a huge format that allows to easily lok at every detail.
2. The books contains exactly the same text as the companion book.
Only the introduction by Barbara Moore is missing.
3. The two books contains a lot of additional text and pictures under the title "From the sketchbook" for almost each card. These are great insights on the thoughts of the artist and on the "making of" process.
4. The books are really very well printed and are a joy to look at
At the end you would have the meanings as well as the possibility to really see all the details of the pictures and as an add on all the personal comments of the artist about the making of the deck.
Of course they are much pricey than the companion book!
Best regards
And no, I am not affiliated with the artist, I just love thes two books
Edit:
I just notice on Stephanie Pui-Mun Law website that the first volume (Major Arcana) is out of print!
But the second volume (Minor Arcana) seems to be still available at $55.
http://www.shadowscapes.com/listing_products.php?listing=7
The first vol. seems to be avalaible at abebooks.com