Ooh you nutter - what have you been up to now ?
I think its quite handy as a drill because it shows up weaknesses between legs. My right is dominant over my left so I know I need to work on building that one up a bit more and make sure its not shirking.
So if the leg thats OK isnt the dominant one, then yeah - could work, but if it is the dominant, then its prob not a good idea.
How long are you out of action for ?