Pitfalls are noticed at all I want to say a big thank you office for free valid certificates. For example, the same cloud to organize with some owncloud via https without a certificate, uncomfortable, or just http, or warning, then set and forget the problem and beautiful green string, or lock the browser, so for myself or any corporate micro solutions mast Kev.
The entrance to the admin pages and orders also make the certificate, there was no damage. The only problem encountered, is the email certificate; if they sign, then apple mail swears on the left signature (and not only like it, I think Yandex also gave dissatisfaction, but need to check), although it may blame for their own bungling.
I recommend to try, also for Free version all registration will take 5-10 minutes.