I enjoyed the first "Tremors" movie a lot, and to some degree or another I enjoyed the next three entries (released straight to video) in the series. However, with "Tremors 5", it seems that Universal Pictures has gone to the well once too often. The move to South Africa does add a little freshness to the background, but film buffs will know that the real reason this entry moved to South Africa is that it's a lot cheaper to make movies there. Indeed, there are some parts of the movie that look like they were very cheaply (and quickly) filmed. This sloppiness also extends to the script - there are some sections that feel they were more or less made up right on the spot, and there are a number of plot turns that you'll be able to predict before they actually happen. The special effects and the attack scenes aren't that bad for a direct to video movie, but it's the material surrounding them that's weak. I feel I should mention that the movie is nowhere as bad as it could have been, but all the same it's a disappointment for fans of the franchise.
