2005 RTM:
Have a form, quite a few control, (full form of stuff, tab pages, buttons,
labels, text-controls etc)
Selecting controls, going in and out between code/design view is a little
bit sluggy, but still doable
Add a Toolstrip, add a few buttons to that toolstrip
Now I have to wait up to a few minutes(!) just to go from selecting a
control with the mouse out of the toolstrip then selecting one of the
buttons in the toolstrip.
Updating the toolstrip or switching forth and back to code view is even
worse.
The more controls on the form, the slower it is...