I've got a 90cm range cooker with the long side oven - hob is gas, ovens are electric. It's a stainless steel one - I love the look of it, and it's a lot more practical than one of my friend's ovens, where she's just got a single mahoosive 90cm wide oven. (Just imagine having to heat all that just for a pizza?!).
I bought it in an ebay auction for under £500 as a graded appliance, otherwise it would have been unaffordable to me - they are SOOO expensive.
I use the small oven fairly frequently - for things liked baked potatoes, casseroles, things in small rectangular oven dishes etc. The big oven's good for roasts, multi-course cooking and having the fan oven setting thing is OK too. I don't really get the point of all the oven settings, really, but 'defrost' has come in handy from time to time.
I must admit, though, that even after two years of having the electric ovens, I really miss a gas oven. I've always had gas ovens in the past and I think they're much better - much quicker to heat up; much more predictable results; just much much lovelier!
If I could have found a 90cm gas range with two ovens, I'd have preferred it...
I'm not sure how much my electricity bill's been affected, because at the same time as the cooker went in, I had halogen lights fitted everywhere downstairs (now regretting it, as I think they might be the source of massive extra fuel costs, and am slowly replacing with LEDs), and it was the start of winter etc... I suspect it's a lot more expensive than gas ovens would be (if they were available on eBay auctions in exactly the right size at the time that I was buying, which they weren't...
Wow - never knew I had so much to say about my oven.