Pros:
Well marked, challenging and convenient location. The course, for the most part, is reserved for the sport, so not a lot of outside interference. There is also a good practice area. The course is mostly wooded with long fairways, and you will need to switch discs and throw types, so it is an overall good course to work on your game play. The boundaries and DMZ zones are fun as well, and several holes have more than one basket.
Cons:
It can get quite crowded. The foliage can also make finding a disc really difficult. Caution should be used on holes 5 and 7, so make sure you have an accurate throw or at least pay attention to where the disc lands. If the weather is bad then I do recommend not playing this course.
Other Thoughts:
I play this course on a regular basis, and so far it is my favorite in Helsinki even though I consider the course to be in Espoo. The course does not have too much variety to it, but it is solid game play. Basically, if you can throw accurate and putt then the course can be straightforward. The scenery can be good, but bad weather takes away from the course big time, in my opinion. Overall, Tali is a solid 18 holes and well marked.