I'm doing my IMC now and it's been really good. Certainly sharpening up my flying skills and has added some purpose to the flying - over and above the £100 burger.
I'd recommend it. As per Joe's post, I'd also recommend it doing it in the airsace that you're going to fly in. There's a reasonable amount of radio work and it can only be of assistance to you. Plus, you'll be used to the approach plates and local info for the airports that you are likely to end up in if you go IMC for real.
Also, hasn't the April date slipped to June/July? (can't remember which)