I'm one of the people underwhelmed with the T5, so I will try to answer your question:

First thing you need to know is that almost all the innovations on the T5 (audio multipads, time stretching, pitch shifting, audio styles, new DSP section) have already been available on the s950 for a year - so they aren't quite innovations that are getting us excited.

- My biggest problem is the fact that the Audio multipads cannot be looped or programed to start at the beginning of a measure (like MIDI ones can). Not to mention that you can't time stretch or pitch shift them. This is such a pity because the technology is available in other places on the keyboard and these features would completely change the way we use our keyboards. These features (or even just one of them) would be a game changer. The way it is now, it's just a limited tease.

- Lack of memory. The Tyros 3 released in 2007 had 6MB of User Ram - which was too little even back then. The 2013 T5 has how much? You guessed it - 6MB. At a time when memory is SO CHEAP, this is just a joke. By contrast the Korg Pa2x had 20MB, and the Pa3x 256MB. The reason USER memory is so important is because it is instantaneous. Running a style from the HD takes a lag of a second or two which could mean your new style starts a measure late.

- 1GB of Flash RAM. Some of us were really hoping for more memory. Considering that I already had 1GB of RAM installed on my T2 (launched around 2004/5), we figured in 2013 we could get at least 2GB as is available on the Motif. Those of us who are heavy pro users are having our options greatly reduced by this limitation.

- Size: I fly to many of my gigs. This year alone I flew 80,000 miles in the USA and Canada alone with my T4. Problem is the Tyros is oversize which can cost up to an extra $200 EACH WAY ($400 round trip). (The Korg Pa3x by contrast comes in undersize and can be flown with for free).

- Drums: This doesn't bother me so much anymore as I spent a lot of time and money sampling my own drums which are a thousand times more punchy and real sounding than Yamahas. But I just don't understand why Yamaha doesn't get it - even Yamaha knows that real drums are necessary (which is why we now have Audio styles), so why don't they give us punchier drums kits (like Korg, Roland, Audya and others). The T5 doesn't even have ONE extra drum kit over the T4, which is the first time this has ever happened in the history of Yamaha TOTL arrangers.

- iPad editing: I wish we could plug the T5 into an ipad and edit the sounds and styles (the way that can be done with a PC). I haven't yet seen an app for this on iTunes or Yamahas website.

- I read the entire owners manual, reference manual, and data list and see NO instructions on making custom audio styles. If this is indeed the case, the Audio styles on the T5 are just a gimmick. Power users and ethnic musicians do not rely on Yamaha's styles - I perform 150 shows a year and very rarely will use a Yamaha style (except for the new EuroPack which I highly recommend). If I cannot create my own custom audio styles, I really have no use for the feature at all.

These are the things that bother me the most. There are other things that bother other people depending on their preferences and on how they use the keyboard. For people such as yourself and others here that use the Tyros "out of the box" or "plug and play", this is an AWESOME keyboard. For professionals on the other hand, this keyboard is a walled garden.

I hope that answers your question.