GO BUY THIS!
Do it now!
Seriously, if you have even a SHRED of love for the old SSI gold box games and have even an inkling of knowledge into the workingss of OGL/SRD 3.5 (aka the "free" rules for D&D 3.5) spend the £15 or approximately $23.38 and get one of the best fantasy tactical combat games I've seen in a LONG time. If nothing else, a HUGE amount of OGL information is at your fingertips at all times in game... you'll NEVER be at a loss for what a condition, item or spell does.
Here are a couple of caveats... this game is definitely indie. The sprite graphics are very low resolution but the animations aren't too bad. The game sounds are pretty retro but they paid a lot of attention to little things like how a spell like "insect swarm" would sound as background noise.
The game isn't completely faithful to 3.5 in a couple of key ways
3 races, one of which doesn't exist in the base game (human, elf and a half-dwarf called "mul")
3 classes, again with one that's not in the base game (cleric, wizard and warrior renamed to knight)
Crafting is somewhat game breaking, and if you're not hip to it, you'll be sad (you can't even find shields for sale before the first big fight, but can easily make them on the cheap)
This is the kind of game that makes me fall in love with the whole concept of indie developers all over again. This would never make it as a mainstream release, but it's so very insanely polished and accessible.