Lego: Lord of the Rings is a wonderful, delightful little platformer, that doesn't disappoint.
It is invariably plagued by all the usual issues of platformers, such as awkward camera angles, devolution of play style into repetitive button sequences towards endgame and iterative puzzles. Yet for all that it is entertaining to play, for any fan of the series (LotR or Lego). Telltale Games manage to make the game humorous, which is where its lasting appeal will lie. From ridiculous gags, such as carrot arrows stuck through Pippin's head and the inclusion of most of the comic relief scenes from Jackson's films, the game will at some point have you chuckling and deliberately rewatching some little humorous cutscene.
The game is also fairly extensive with lots to do, and may require multiple playthroughs to see everything and acquire all the items. There are lots of little secret areas tucked away to find, some of which are quite beautiful, even if rendered in lego blocks! It is this encouraging of exploration where the games longevity will predominantly lie, so in terms of time to money investment it is worthwhile, especially as it is relatively inexpensive now.