Finn here.
It's true that Finnish spelling is very simple. The mapping of sounds to letters is quite regular, and much more so than in English. As an example, the word 'computer' is 'tietokone'. The pronunciation is [tietokone].
As a result, a "spelling bee" is a completely foreign concept in Finland. A Finnish spelling bee would go on for days.
The grammar of Finnish, on the other hand, is very irregular and full of exceptions. There are 16 noun cases. This makes Finnish laborious for English-speakers to learn.