The App Shelf for iPhone and iPod touch

Pros:
Breathtaking scenery; simple but fun; currently the best golf game on the iPad.

Cons:
Casual mode maybe too easy; advanced mode too hard; unlocking customizable looks takes too long. There's also a bug in the app that sometimes causes the game to lose sound and a device restart is required to get it back.  All that said, this is still a great game.

Lasting Appeal:
The game offers a decent amount of content with 4 unique courses, 63 holes, and four different golfers.  The game offers hours of original gameplay, and if you enjoy the casual play, the app may find a permanent place on your device; however, after too much repetitive play might, players might find themselves memorizing the best approach to certain courses.  

Bottom Line:
Let's Golf HD is without a doubt the best golf game currently available on iPad.  Various elements, such as the game's cartoonish characters & simple club selection, may be initially off-putting for more serious golf-gamers, but the beautiful scenery and light-hearted approach make this an enjoyable and refreshing app for casual gameplay without completely eliminating the challenge for serious gamers.

Repurchase if you own iPhone version:
Maybe.  Like many other iPhone to iPad ports, there's no new content here, but if you're dying for a golf game on your iPad and don't want to pixel double, Let's Golf HD is still your best bet.

Pros:
•Three new large maps specifically designed for iPad
•All the classic maps from iPhone version
•Several multiplayer modes, including bluetooth or split screen.
•“Safe” fast forward button
•Simple, addictive gameplay

Cons:
I can’t think of a single thing.

Bottom Line: 
Flight Control HD is a line drawing, time management app.  The original managed to hold the #1 Paid App slot on iTunes for several weeks.  Flight Control HD is one of the few iPad Remakes that manages to completely set itself apart from the original.  The larger screen space allow for significantly bigger maps, making it Flight Control HD a whole new game!  If you’re a fan of the original, you’ll love the iPad version, too.

Repurchase if you own the iPhone Version? 
Yes.  3 new large scale maps.

Pros:
Stunning graphics; fully customizable UI; great gameplay; local and online multiplayer deathmatch.

Cons:
Default UI is awkward (customize it!); nothing new over iPhone version.

Bottom Line: 
N.O.V.A. HD is a stunning FPS (first person shooter) for iPad.  While the default controls make playing the app on iPad seem incredibly unwieldy, customizing the layout in the options menu makes all the difference.  If you enjoy the genre, are a fan of X-Box’s Halo series, or just love multiplayer deathmatching, N.O.V.A. HD is highly recommended.

Repurchase if you own the iPhone Version? 
Only if you play a lot of multiplayer; the larger screen makes the experience much more enjoyable.

Pros: Great graphics; fun gameplay; price includes all 5 maps; perfect for iPad's large screen
Cons: If you already own it for iPhone, there's nothing new here, content-wise.
Bottom Line: Fieldrunners is one of the premiere tower defenses apps for iPhone OS.  Without a doubt, iPad's large, high resolution screen offers the best Fieldrunners experience, but if you already own Fieldrunners for iPhone, it's probably not worth the $7.
Re-Purchase if you own iPhone version: No