@TennisMD
We are reviewing some extended length racquets this week and I've been able to test them alongside a standard length racquet that lives in the family. I'm fairly consistent in my "why I don't ALWAYS use an extended racquet at the moment," but will do my best to share my experience. At first, one of the extended racquets was hands down my favorite of the 3 I'm testing...and then I started playing points with it and I started having a few issues.
When it comes to hitting (just strictly drilling and mashing balls) with extended racquets is pure awesomeness for me (this is where I've been known to say, it's a "guilty pleasure"). However, once in point play, that extended racquet can be a bit more demanding when pressure is on or points are longer or even when taking swipes at returns. Because of my longer, fast groundies, I can easily make mistakes and catch the ball late on a return or over hit with extended racquets. Or, get jammed and not be able to get around the ball effectively. I have less issues on serving with extended frames, and really think they help hit bigger first serves - so no complaints there! And at net, I am more than happy to use an extended racquet - they are usually stable and offer that extra reach. I just mainly get a bit stuck off the ground at times which is the one downside for me.
The swingweight on some of these extended racquets can get up there, but where I like it. So it is easy to gravitate to them and appreciate what they have to offer. And then also just makes me lust over potential racquets I would love to see extended. And you can guarantee there is always at least ONE extended racquet in my bag always and usually one of my "feel good friday frames" is an extra half inch long
So no, I don't use one as my racquet of choice, but I do appreciate them and love swinging them. Most recently I was really impressed with the Solinco Whiteout 305 XTD!
Hope that helps -- if you are on the fence between standard and extended length, I say just go for it and swing big!

Michelle, TW