I've used quite a few Leisure Arts crochet patterns and books over the years, and I've had a really positive experience in general!
Their tutorials are usually very clear with good illustrations, which is great whether you're a beginner or just learning a new technique. There's usually something for everyone since their designs have varied styles from very traditional to more contemporary!!
If you like amigurumi, their "Dandy Dogs" and "Zoo Amigurumi" books have some really cute designs that are well-written. They also have some excellent "Learn to Crochet the Easy Way" books that are perfect for absolute beginners with very straightforward projects.
I find their patterns to be quite reliable, and I rarely run into issues with stitch counts or unclear instructions.
Happy crocheting!!