That's something for you to decide, foremost you should read the description and the tags, if they are appealing to you give the game a try. For me it's worth playing, this is one of the games i already bought on Steam. The number of pages on the thread isn't any indication if the game's worth playing.
The number of pages don't say anything. There're some really bad games here with hundreds of pages and some really good ones with just a few. Many good games are flying under the radar here.