The Solstice in Delta T is a stable to slightly overstable midrange. The rim is not agressive and the flight plate is conistantly flat. The plastic is fairly stiff, similar to KC Pro. The Solstice is a great all around mid if you throw forehand and backhand. In Delta-T, it's not as stable as the numbers suggest. This disc really shines on forehand throws as the hand feel is amazing and is workable, but requires a little finesse and technique to acheive desired results. 

I was hoping to find a p line md4 replacement, unfortunately this isn't the disc. It looks and feels similar, but is very understable out of the box. The flight numbers are false advertising. This flies like an esp buzzz ss, so I was very disappointed in its flight. Thrown on hyzer, it flips to flat and slowly keeps turning before slightly coming out of it at the end of the flight. Keep in mind I'm not a power thrower and max out my midranges around 330'. If this was advertised as an understable midrange I'd say it a winner, unfortunately it claims to be an overstable midrange. 

I picked up this disc to be a winter replacement for my MVP Pyro purely based on the flight numbers. This disc has nowhere near the stability of my Pyro. It is still going into the bag as a winter replacement for my beat Compass. It flips up from a hyzer release, flies dead straight, then glides straight forward to the ground. Overall it flies very nicely, just not as I expected.

Okay, Millennium was pretty blunt in saying that it is the MD4 mold from Discmania...

The quantum one is pretty stable but still can glide a little more than my Recon Mortars. But the DT...this disc will work into the straightest mid you will ever see. It holds the line with integrity, and still gives a left fade if you power down on it. I liken this to a very flat Roc, and it suits a backhand and forehand very well. I'd highly recommend this mold and plastic combo to anyone!