Feel of G7 is great.
MX1000 is too heavy and just is uncomfortable and feels sluggish to me.
MX518 was the best mouse up to the G7. The G7 is cordless. The battery life is 1 day but you do have two packs. Given the average Li-poly life is ~500 cycles you're set for 3 years+ use which is good enough as typically I throw away mice after about a year anyways.