Workblows and others-
A friend of mine bought a 7'6" MH Guides series muskie rod and I felt it was pretty OK. I'm a St. Croix Avid guy, and I still liked this rod. Pretty light in weight, not too whippy, yet not too overly stiff. All in all, seems a nice muskie rod for 80 bux. Only think I don't like about the GM rods is cosmetic: they have this stupid looking silver/chrome tip that just totally does not fit the rest of the rod. I'm sure they're probably fine, but they look funny and are even kind of shaped weird. Different design than the rest of the guides on the rod.
On the action, or weight, of a muskie rod, I'd get at least a 7'6"er. The trend in muskie fishing is longer, somewhat more limber rods. Those short "pool que" rods are a thing of the past. Longer rods help you control a bait easier, are far superior in a figure 8 and the more limber rods will help you absorb the shock of a thrashing fish. I've got a 6'6" (MH or H, can't remember) Avid that I never use because its waaaay too short, and stiff.
On GM's guide series spinning rods: junk. I had one of GM's "walleye" series rods that I bought about 10 years ago and that thing was amazing. Limber where it needed to be, stiff where it needed to be and it had great sensativity. But, it got stepped on and the tip was broken off. The one I got to replace it is pure junk. The other guide series rods I have are pure junk too. GM's lightest action rod is called ML, but its more like a M or a MH in weight. Waaay too stiff, and near zero sensativity. Not sure what its intended for, but its realistically a rod that would be fine for casting #4 mepps spinners and spoons for pike.
If you're looking for a nice, affordable, sensative rod with good action, I just picked up a St. Croix 6'6" Triumph spinning rod. Seems nice so far. Its St. Croix's low end rod, and sells for 60 bones. Not even in the same category as the GM Guide Series rods for action and sensativity, but about the same price.