This has just about everything you could need for interval workouts except for 3 things....

My only gripe is it needs the following 3 features added:

1) Set interval time of 120s added (currently you can only get it up to 90s with the update)
2) Warmup/cool down time of 5 minutes added (currently you only have the options of 0-3 minutes of warmup/cool down time for your workout)
3) Add an option such that when you complete your warmup time you immediately enter into your fast interval (normally it gives you your slow interval first followed by your fast).

If it had those features added Id give it a 5/5!

ryeookin about ITGO - Interval Trainer GO - The Ultimate Gym and Outdoor Timer for Cardio Health, Fitness and Well Being