I am a user of Sharp healsio steam oven... been using it since last christmas... it's now an indispensable tool in our kitchen.
I had the same apprehension when i first decided to explore the steam oven becos' of the price. But, it's definitely more healthier than microwave ovens. The time taken to cook may take longer, eg. microwave 2mins, steam oven 8 mins. but it's all worth it for health reasons.
I have tried baking, grilling and roasting using the oven. My husband loved the roast chicken (compared to microwave convection oven) as it's crispy skin but tender and juicy chicken meat.
will highly recommend it.