I bought this disc after I read many favorable reviews on multiple sites, including this one.  I really like the Z Flex plastic!  Feels so nice in the hand.  As for the flight, it has changed over time.  Out of the box, there was more right to left turn, but now that it I have broke it in, it flies a lot straighter, and a bit further.  If you are looking for a disc that is comfortable in the hand, flies fairly straight (especially once you break it in.), and gives you some pretty good distance, this is the disc for you.  I would also say that this disc is somewhat beginner friendly, but could be utilized by all players at different levels.  

An excellent disc. I bag two: 169 Z and 175 Z FLX.

This is a very good first driver that will prove stable but not overstable for new players. The Undertaker beats in to a neutral flight path that makes it useful for a huge variety of shots: hyzers, flip ups, turnovers, woods shots, low ceiling, et cetera.

My newish 175g Z FLX Undertaker is great in the woods. Off the tee, I can punch it through gaps, knowing that if it hits a tree it won't kick as far as a stiffer disc. In scramble situations, I can step out and flick it or throw patent-pending backhands that weave through trees for the full flight of a disc.

My 169 Z is beat in, and I use it for tailwinds and straight fairway shots when I want the disc to flip up and drift.

In summary, this is a great disc that doesn't require a lot of power to flip or turn, but will also fade at the end of flight if thrown with love and care. Now that I can throw hard, I'm not using it off the tee except in the woods, but I still love the Undertaker for its pretty lines and versatility. 

Great disc! Flies just like the flight numbers. That z flx plastic feels awesome. Highly recommend that you try it.

173 Titanium Undertaker

I really really like the Undertaker. I got mine as a part of the Infinite VIP club and it was a disc that I had always been looking for. I remember a year or two ago my friend let me toss his Teebird around and it had just this little bit of turn and was just a great flying disc. I had purchased others after and the were more overstable than his was so I gave up on them. Out of the box the Undertaker was exactly like that Teebird that I had always wanted. A slight bit of turn and a decent fade, this disc is just really fun to throw. It's super reliable and would be a great addition to most people's bag. Would recommend.