Climb is pretty hard. Lots of rock slide parts so be very cautious in wet conditions. Lots of ice and snow still on the trail in April. If you do this hike before June be prepared with trekking poles and microspikes / cleats for your shoes.
The trail between Giant and Rocky Peak is very primitive and difficult. Whole thing was icy and snowy in April. The giant side of this trail is very steep and challenging, but the Rocky Peak side is not nearly as bad.
I can imagine this route is much easier in the summer months, especially when dry. It just has some pretty steep sections.
The views off both mountains are very good and pretty unique compared to other high peaks due to their location. I could see Lake Champlain and the mountains of Vermont to the northeast, Dix Mt and Gothics to the south and Whiteface to the west.