There's very little to complain about in Battle for Wesnoth, if you enjoy this style of gameplay in the first place. I encountered no glaring bugs. The starter scenarios I found to be very easy once I'd mastered the basics, but more advanced scenarios proved much more challenging, so don't be put off if your first few games seem too simple. There's an active development and player community.

Since Battle for Wesnoth is an open-source game without any major company behind it, it's possible you may encounter glitches due to specific graphic cards, drivers, or hardware features (I didn't, but I have in other games with the same kind of development model). If this occurs, the is the best place to go for help.

With a price of "free," if you like turn-based tactical games, it's hard to find a reason not to try out Battle for Wesnoth.