I’ve been looking at upgrading one of my past clients from Doctrine 1 to Doctrine 2 and so far it’s looking from my end like a done deal.

I started here by paging through this ( http://www.slideshare.net/jwage/doctrine-2-not-the-same-old-php-orm ) slideshare on Doctrine 2 and before I got bored with paging through 94 slides I already had a warm fuzzy feeling.

My initial tests have shown that Doctrine 2 without a doubt needs support from APC or memcached, but with the exception my few and far between dumb/cheap client’s is almost guaranteed to be present. Otherwise I like the decidedly simpler syntax for defining domain models as simple classes without inheriting some super support class.

Last bit, my stackoverflow answers regarding doctrine 2 so far
http://stackoverflow.com/questions/5954618/does-doctrine-2-0-pre-generate-model-classes-like-propel-1-5-does/5955400#5955400