The ability to create custom characters was one of my favorite parts about this font when I first started using it last year! It's also easy enough for beginners (like me) as well with its clear instruction manual that comes along with every package you purchase from them - so no need to look up how things work or worry if your not familiar yet either :).
There are some other fonts out there which do have more character options than just plain old Roman letters but they tend be pretty pricey too ($$$$), while sibername has great prices compared to others i've seen recently! Nothing really at all actually; everything seems fine though nothing special came across since we use mostly English language text anyway :).