I've never heard of 'festa brew'...but maybe its a bit regional.
I would try some different kits. Any kit that has you add a pound or two of sugar is going to give you a thin beer, and pre-hopped extract kits are pretty tame on hops and bitterness.
I'd get a kit that uses nothing but liquid and/or dry malt extract, hop pellets, and some quality yeast (Danstar, Fermentis...not a 'no name' packet).
__________________ Malkore
On tap: Camelot Ale, Lancelot's Wheat, English Brown Ale, Steam Beer, HoovNuts IPA
Bottled: MOAM, Braggot, Raspberry Melomel, Merlot, Apfelwein, Pyment, Sweet mead, Cabernet
Primary -
Secondary - Vanilla mead
Gal in 2009: 27
Gal in 2010: 34
Gal in 2011: 13
Gal in 2012: ~
I've used FestaBrew kits before any I really like them! I've found that they produce a better quality beer than the extract recipes I've brewed; save 1 or 2.
__________________
Primary: Edwort's Apfelwein
Primary: Brewingcentres Pale Ale
Primary: Brewcraft - Cheap 'n' Shiddy Bavarian Wheat
The Festa Brew kits are exceptionally high quality, and if fermented correctly from a fresh kit, will taste better than nearly any extract kit out there.
It sounds to me like you overcarbed the recipe, or they could just be too young. Unless they have been in the bottle for at least 3 weeks at ROOM temperature, it is too early to tell.
If they still taste this way after 3-4 weeks, I bet they are over-carbed.
There is also a small chance that you developed a wild yeast infection and that is causing the overcarbonation and thin body/lack of flavour.
I can't speak for Festa Brew, but I've done two Brewhouse kits. The first was a cream ale, and it was green for quite a while. Only after about 6-7 weeks in the bottle was it very good. The second one is a light lager which I added some Apricot puree to, and that was has been conditioning for just over 4 weeks, and so far so good. Perhaps try the Brewhouse kits for your next one?
haha Festa Brew you must be a maritimer!!
Edit - or maybe not, haha I had only seen these things previously at the noble grape which is a maritimes homebrew chain.
My first drinkable beer was made with a festa brew brown ale kit. It was decent and all my friends thought it was fantastic.
I doubt ill ever go back to festa brew again, but i found the brown ale product to be decent. From everything I read about homebrewing It seemed that it just wasnt cutting it from what could be accomplished with a little more time and effort used.
And like most beers im fairly sure they will get better with time.
__________________ On Deck...
Kolsch
Primary
Dark Belgian, Hobgoblin Clone
Kegged
Dark Ale
Bottled
Fruit Braggot, EdWort's Apfelwein, Coffee American Stout