I was probably only going to rent it anyway, but last week's PC 'beta' reinforced that stance.
The two maps they had along with the gameplay made the game feel like Call of Duty meets Battlefield and it didn't do a great job in either. The map that takes place in the snow covered mountain has one team pushing from one objective to the next like Bad Company. Unlike the Battlefield series, however, the map is much smaller and doesn't offer a whole lot of space to manuver making horrible choke points when you factor in how quickly you die under fire. I don't know if it was tweaked in the final vresion, but the spawn points in that map were horrible in that you could spawn in your 'base' and only be a stones throw away from the battlefield allowing somebody to snipe you a moment after you respawn.
I hope that DICE doesn't mess up Battlefield 3. . .