Pros: silicone is more durable than plastic, added bling to mod list, smooth inner walls flow air better than corrugations, potentially more colorful (in that order).
Con: you'll spend some of your hard-earned money on a part that won't make a huge difference in power.
I'd say it's totally worth it!
I have the black silicone hoses that came with my Turbo XS tmic... not even sure what brand they are. They're secured with T-bolt clamps, and so far, I haven't had any issues with them popping off or leaking.