Pathfinding issues aside, and the busywork looting that was adressed in the EEs: These games still hold up at their core real well, in parts because the industry's main aim in subsequent years was it to make games more cinematic (e.g. cosmetic changes in presentation), as well as making things more accessible to reach an even bigger audience (oft at the cost of system depth, which was also one of BGs strengths, being a fairly faithful adaptation of (A)D&D).
BG2 in particular also happens to have a ton of content even by modern standards -- engines have become ever more complex so that the same amount of content takes much more time to develop. Additionally, unlike many older games, the BGs control just like any old and modern RTS, and things barely get more intuitive than that on a keyboard and a mouse.
tldr; Have fun, but don't forget the first game (which I actually still prefer overall in big parts due to its more free-form exploration).
