I discovered this the other day - Piano One. It's a modelled (supposedly) Yamaha C7 which is quite lightweight both in disk and CPU resource. The staccato release isn't quite right, I have to say, and held notes are cut off after several seconds rather unconvincingly, but these defects aren't actually noticeable in most playing styles, and the sound is surprisingly convincing, because there seems to be quite a bit of cabinet and soundboard resonance captured in the sound, which really makes it sound much more convincing. It certainly, to my ears, is a considerable improvement on TruePianos. And it's free. Worth a try, in my opinion, at any rate.

Thanks for sharing. Another great option is SampleTank FREE has a few piano sounds in it.

It certainly is a worth checking out if you are on a tight budget aj.

It's a much better bet than any Sampletank based piano I can think of.  In fact I'd go as far as to say Sampletank would be my last choice when looking for a piano sound in particular.

held notes are cut off after several seconds

define "several"...

The staccato release isn't quite right, I have to say, and held notes are cut off after several seconds rather unconvincingly....

I had that same problem, and I've upgraded each time they came out with a "fix". For me, holding the keys for more than 3 or 4 seconds would get you the weird cut-offs. I've since un-installed it, since it didn't work well with my style. The piano sounded okay, but eSoundz offers some great SampleTank piano collections for very little money. Of course, there are many other free or very low-cost piano VST instruments out there.