Ranked in these QuestionsQuestion Ranking
Pro Community rated answers
Unlike a number of other Q&A sites where the person asking the question picks the winning answer, Slant accepts that they're asking because they don't know the answer, so allows everyone in the community to pitch in to voting up the best answer.
Pro Pros and cons vs users' answers
Most Q&A sites give each user the chance to give an answer (sometimes multiple answers). A lot of the content of each user's answers will overlap, resulting in duplication of information (thus more to read), or information being lost in noise (e.g. if someone sees existing answers and adds a missing point without copying existing information, their point will likely languish at the bottom of the list of answers as it did not answer the majority of the question).
Slant approaches this differently; rather than focussing on the users it focusses on the points; Pros and Cons. Any user may amend the information in a pro/con, may vote based on how much that pro/con influenced their decision, and may add their own pros and cons if certain points are missing from the canon.
Pro See all answers clearly
The list of possible answers can be easily viewed as a list, making it a good starting point for researching the available options. This is the converse of other sites in which multiple choices may be listed within a single answer, with the need for the user to read through paragraphs of information to pick out they key articles.
Pro Designed for subjective questions
Slant.co's raison d'être is to answer subjective questions. It was born of a knowledge the other sites existed to handle objective questions, and that simple forums existed for Q&As but made no attempt to handle the intricacies of subjective answers. Slant.co is the only site focussed on solving this specific area.
Pro Multiple chosen answers
Subjective questions may have more than one answer. Slant allows people to vote for more than one answer as being correct; and to append the pros and cons which influenced their decision to their vote; thus giving context of in which situations each answer may be considered correct.
Pro Pro/con association
When upvoting existing answers, you can associate the pros and cons which influenced your choice of chosen answer(s).
Pro Public visibility
You do not need to have an account to view existing content (questions or answers), so people can see what they're getting before deciding if they'd also like to sign up for an account to contribute to the site.
Pro Subject matter: programming tools, services, & technology
The site is currently dedicated to questions within the technology area.
It is implied that as popularity grows it may open up to questions in other subject areas (ref: use of "Starting with..." on their Twitter profile).
Pro Allows Google independant rating for android apps
It can be difficult to get user-ratings for Android apps, that are not available on the Google Play Store.
So far other sites either indirectly uses Google Play Store rankings or some technical writer tells you "which are the best XXX apps for YYY".
Con Needs improvements to avoid redundancy
Many question can lead to the same app.
If you comment something on "Total Commander", you have to do this in more than one place.
According to this the Slant team is working on this issue.
Con Can be quite biased
The site is still young and has yet to build up the large user base required to have users with knowledge of all areas in which questions may be asked.