I've used both - Muzzys for several years with good results but I decided to try G5's this past season.

The muzzy blades do tend to bend or ripple but, as was pointed out, they can be easily replaced. The G5 I shot my buck with this season passed through and hit rocky ground beyond. The blade edges were nicked and even with the prescribed sharpener, it was very difficult to get them back to both sharp and smooth.

Both of the ones I use are 100 gr and they shoot exactly the same from my bow. I still haven't decided which I like best - happy with either one.