Great features, difficult to set-up, not good for "off" brands

I bought my Logitech Harmony 670 on sale at best buy for $119.00 last week. After reading positive reviews on other sites, it seemed to be the way to go for my solution, however the results I wanted were never obtained.
On the surface, the Harmony is the perfect solution for someone that has multiple devices and it looking for one easy remote to handle it all. However, I found a lot of problems/gripes.
First off, and this is the major one. I run an Olevia Flat Panel 232 LCD television. These televisions are notorious for having little support from the universal remote manufacturers. Most remotes, even learning remotes, cannot work with the television, not even to turn it on. That being said, this is the first remote that does operate the tv, but it does so very poorly with mixed results. Logitech carries the television in its online database, so setup should have been easy, but it wasn’t. I spent over two hours reconfiguring delay settings and a myriad of other settings just to get it to turn the tv on. Once I had it set up to the best of my ability, it still has mixed results, ie: the tv takes forever to turn on, the volume does not work when you push the up button, you have to push the down button first.
All that being said, I will give the benefit of the doubt to the device because it seems that no manufacturer has made a working compatible device for the 232 olevia series of television.

So, here are some other gripes. There is no simple “on/off” button for each device. Instead, you need to select the device type through the lcd window, then use the keys to turn it off or on. This does not sound like a big deal, but if you only want to shut off a single device (such as the tv or dvd player) it is not a one click step, you have to go through three keys.
My next gripe is that you have to decide to replace all of your remotes and never use them again. Here is why. The Harmony remote remembers if your television, dvd, cable box, etc is powered on or off, and what input setting it left the television at. So, if you turn the device on with the harmony, and then use another remote to change the input of your tv/receiver, or turn a device off, you must then change everything back to the way it was so that the harmony device does not change all your settings again when you hit the “play dvd” or “watch tv” button.

I think that this would be a powerful device, but only if you are committed to not using any other remotes, and you have all name brand devices.