Link-Assistant's last launch on Appsumo was Website Auditor. And it was my very first LTD! Even if I don't use it much anymore (because I don't do SEO often), it's still between the best deals I ever purchased.

If SpyGlass is on LTD also, I would go for it!

It's a great tool, I did some checks and it's pretty accurate. It's easy and fast to use. Very intuitive. Good reporting.

All in all - very nice stuff :-)