Agreed, LL is entertaining, but suffers from mis-casting with the smug, unctuous and ever self-conscious actoring of Matthew "I feel it's time to take off my shirt" McConaughey in the lead role. In my 10 years of practicing, I saw rather few 30 something lawyers who looked like they could drop and do 300 situps, or would want to. Tomei OTOH, always fetching and substantive, is great casting and you can't say enough good about her (she deserved that Oscar!). Tom Cruise (or others) might have been a better fit.
I recommend the very fine "Source Code."