If I had a week at Alta/Bird I would hit Solitude, but I find the terrain "limited". It is a good half day resort for me, someplace I would recommend after you have explored Alta/Bird and are ready for a change. I looked at the map( www.skisolitude
) and was reminded why I feel that way.
My comments refer to black skiers(not blues). You have the front six blacks which are nice, but if no snow for 3 days, they get bumped up with those hard deep bumps because they are major thoroughfares and very acessible. They are nice and steep though. Those forest/tree skiing to the left, headwall forest, parachute etc. are quite steep and hairy for trees skiing, (don't forget chute for parachute!), doable but I find much more hairy than say Bird Gad II forest or even many of the double black gates.
I never hit the Honeycomb on a good day, but have skied it, and once you are in the gully, you are in it, and have a long ride down with a few lifts to do it again, then again, more hairy tree skiing. The summit lift has a nice little, high, "short" bowl to ski. I'm not down on Solitude, but for me it's a half dayer, (although I could see real good sense in a powder day there!), and be careful if it is skied out, because even with the light crowds the bumps get big and ugly quick.