I have a 2005 infiniti g35 coupe and I'm looking to purchase a programmer. I was wondering if any has any recommendations or reviews on programmers they have purchased. Thanks!

The only option for Nissan is Osiris, and I must say it does wonders.

What are the gains?

ALL KINDS OF GAINS!!!

It depends on your location and current condition of your car.

The gains, like with any tune, depend on your breather mods list. A proper tune is more than just about gains tho. The car just feels like a much higher end product after Osiris. Everything is smoother from the throttle response, to idling, to high rpm feedback. The car doesn't like to rev before the tune, and it loooves to rev after the tune. Taking it to 6k feels just as smooth as taking it to 3k. It's just an overall improvement of performance

The other options are Cobb Tuning and Techosquare.

Cobb stopped supporting the platform in 2012, plus, it was garbage. The ONLY option is Osiris if you want a real tune.

I have Osiris and it is a great unit, but saying its the only option is misleading.

Did you think your 0-60 time was quicker? was the speed limiter removed? and how is the throttle response with the tune?

^ TQ and HP improved, so yes 0-60 times improved. I can't recall if the speed limiter was removed or not, but the throttle response was vastly improved.