my current steamer is the cheapest one I have had and IMO the best. Its an H2o one. I am told that the pumps don't last as long as others do but IMO its worth it to get the better performance.
My kids recently bought me a Karcher window/tile steam cleaner at Christmas. I very much doubt I will ever use it. It appears to me to be far easier to use a bucket and chamois as I have for over 50 years. I like to wash down the window frames as well as the glass.
sorry, miscounted, 4th steam mop not third. The previous ones were Karcher, Oreck and Hoover. The Karcher was useless and both the Oreck and the Hoover died, the Oreck within guarantee and it was QVC so I got a full refund, the Hoover out of guarantee and I got diddley squat.