I have used RightView going on 3 years. The lesson information included with the package is very informative, and as a tool for comparison, RightView is as good as it gets for the price. The problem is, you can see WHAT they are doing, but the HOW is the magic part. For that, I turned to Englishbey and others. There are several professional "hitting gurus" out there, all with their own flavor of the Rosetta Stone of hitting. What worked for me was taking a little of this, and a little of that, then putting it all together. When I found something that made sense to ME, I used that, and discarded the useless stuff.
There's a ton more to developing good hitting, which is way more than just good swing mechanics. There's vision, timing, mental approach - etc. Emulating the good hitters is one thing, but you still need to study and understand a little bit about kinesiology, pitching philosophy, and all the things that make a hitter, well, GOOD. Just because Steve Englishbey says so isn't good enough for me. Because if it doesn't work for my kid, it's useless. His concept may be sound, but I may alter the teaching method to suit my needs. After all, it's the end result that counts.
Don't get too caught up in trying to exactly copy some other hitter's movements. Even the RightView lessons state that all the MLB hitters learned to hit in different ways, but they arrived at the same exact end point. Albert Pujols doesn't even stride, and he is one of the greatest power hitters ever! The key is finding how YOU can hit against a firm front leg, without your front side flying open too soon. Some hitters actually start pidgeon toed to force themselves to stay closed. Others don't even really think about it, and land at about 45 degrees. BUT they ALL have found how to hit for power. I mentioned loading in my first post, because I think this is one of the most overlooked parts of high school softball hitting. Very few actually do it! By contrast, almost every DI college power hitter loads well. But that's just one part of it.
My suggestion is to study as many elite softball hitters and MLB baseball hitters (only the greats) as you can. Figure out what they do, and how they do it. Video your DD often, especially in game hitting. Use lots of encouragement to guide her along. Let her watch the video, compare it to the elite hitters, and encourage her to make suggestions about what she might do to get better. Besides, that video will be priceless when she has kids!!