Absolutely dire.
The dialogue is cringeworthy, and made even worse by such poor delivery. Almost every word uttered sounds forced, contrived.
The plot is okay in general terms, but collapses once you get down to the detail. The main character continually overemphasises his sleaziness and rebel-without-a-cause temperament and ends up in a heavy-weapons fight with two crew-members all over a bottle of whiskey. In real life, such a misfit would never have been allowed anywhere near a NASA facility, let on board a mission to Mars.
Casting: Terrible - at least as far as the main characters are concerned. The minor players - such as the two pilots - should have been put in the major roles as they are clearly more competent and deserve better than this lousy movie. To be fair, though, most of the cast have been compromised by the awful script.
The directing isn't too bad, but as the old saying goes, "you can't make a silk purse out of a sow's ear."
One of the worst aspects of this film is the CGI. At times you'd think they'd used the stop-motion techniques employed in the "Jason and the Argonauts" movies of the 1960s.
Give this one a miss.
