Quint Druid
Just adding a two pennys worth.
I have bought Quint Druid and in the most I really like it. I feel the druid offers a very interesting path to take. If you like the wildshaping part of druids you ought to check this out as there is a radical change to its approach which probably works with some tinkering. Essentially you choose what you want want to wild shape into and includes the likes of magical beast, if you want to increase the number of times per day, specialise in a particular kind of beast, advanced options such as increasing the CR of creatures you turn into, etc. There are some oddities that you could easily house rule out if you used these rules. The oddities include allowing druids to wildshape into undead(!?) and allowing the supernatural and spell like abilities of creatures you turn into (at increasing level). This is obviously too high powered as even shapechange does not allow this and one of the forms you can wild shape into at the right level is dragons....breath weapon every 1d4 rounds! The writer was trying to incorporate the change you get when the traditional druid turns into elementals and gets (su) and (sp) powers. However, there are some really good aspects for the shapeshifting including partial and combination transformations and the true form change.
The spells are pretty useful and as you would expect. The magic items (basic ones) are sparse but they add extra ones in such as living magic items....spells on plants (ie think scrolls=petals), living trees that act as wands or staves, monsters grown from eggs and imbued with magic to turn them into items eg black pudding armour (i just love that one).
The prestige classes are alright and again filling niches you would expect....why do Mongoose more often than not do 5 level classes?
So all in all I think it is a worthy addition and there will be stuff you will get from it and areas you will not touch at all either from flavour (ie Otherworld or Arkanix) or too over powered (ie su or sp with wildshape).
Hope this helps.