Looks great (the Lumia line has by far my favorite SP design), got great features, but the 920 has one disadvantage imo. Specs taken from manufacturers' sites:
Nokia Lumia 800 - 142 g (my current phone, love it)
Nokia Lumia 820 - 160 g http://www.nokia.com/global/products/phone/lumia820/
Nokia Lumis 900 - 160 g
Nokia Lumia 920 - 185 g http://www.nokia.com/global/products/phone/lumia920/
Apple iPhone 4s - 140 g
Apple iPhone 3GS - 135 g
Samsung ATIV S - 135 g
Samsung Galaxy S3 - 133 g
Samsung Galaxy S2 - 116 g
Samsung Galaxy Note II - 180 g
Samsung Galaxy Note - 178 g
HTC One X - 130 g
HTC One S - 119.5 g
Nokia Lumia 920 - 185 g (70.8 x 130.3 x 10.7 mm)
Samsung Galaxy Note II - 180 g (80.5 x 151.1 x 9.4 mm)
The new flagship Lumia is too heavy for its size, at least for my taste. Heavier than the Galaxy Note II despite being smaller. I already found the 900 a bit too heavy for me. I'll keep my Lumia 800.
For those interested - Lumia size comparison:
Lumia 800 - 61.2 x 116.5 x 12.1 mm
Lumia 820 - 68.5 x 123.8 x 9.9 mm
Lumia 900 - 68.5 x 127.8 x 11.5 mm
Lumia 920 - 70.8 x 130.3 x 10.7 mm
