The main difference is the beveled lugs in the forefoot area of the shoe, which *should* help runners make the transition to a more efficient midfoot/forefoot technique.

From the Newton web site:

How does the Guidance Trainer differ from the Performance Trainer?

Beveled Heel and Toe: helps guide runner easily into the midfoot/forefoot
Beveled Lugs: smoother, stable feel that is more gradual in the forefoot
Wider midfoot/forefoot and lugs: adds stability and creates a softer feel
Midfoot Chassis/Shank: adds support and stability
Carbon Rubber Outersole: increases durability
Closed Mesh on Upper: keeps small debris out

UPPER

Highly breathable, fast-drying, closed mesh
Slip-proof laces with heel-securing double eyelets
Lightweight ergonomic support strapping
Metatarsal stretch panels
Reflective logo and heel tab

MIDSOLE

Single-density, high rebound EVA that stabilizes all foot types
Second generation Action/Reaction Technology™ forefoot and heel
Midfoot/rearfoot support chassis for added stability
Beveled heel and toe
Met-flex enhanced forefoot flexibility
Enhanced sock-liner that increases energy return and protection
Accommodates orthotics

OUTERSOLE

Second generation durable, high traction actuator lugs
Increased toe spring
Pronounced heel rocker
High-wear carbon rubber with traction tread

GREEN FEATURES

100% recycled laces, webbing, insole top cover
100% recycled box, packaging
10% recycled outersole rubber

At $149.00, the Isaac is also a little cheaper than their two performance trainers — the Gravitas and Motus are both priced at $175.00 — which will probably entice quite a few more people to jump on the Newton bandwagon so-to-speak. Newton Running are currently offering a FREE shipping promotion on the Isaac too – click on the image above to take advantage of the offer.

Don’t forget, you can always take advantage of their 30 Day Return Policy and Guarantee. If you are not completely satisfied with the shoes, simply contact Newton Running right away and explain why you would like to return them. The shoes can be returned within 30 days from the delivery date for a full refund. Can’t say fairer than that….

Just thought I’d pass on a great upcoming offer from the folks at Road Runner Sports:

Starting January 1st , customers can enjoy the biggest savings of the year! Just in time for the new year, Road Runner Sports is offering 10% off and FREE shipping on orders. This offer is available through January 26th.

Don’t forget to bookmark this post to take advantage of the offer when it starts on New Year’s Day! You can’t beat a good sale to start off the new year…..

Fall is right around the corner and Road Runner Sports have over 2000 new arrivals for you to choose from, including gear and apparel from Nike, Adidas, New Balance, Puma, Brooks, Asics and the other leading brands.

Sometimes Road Runner Sports offers a 15% discount, sometimes they’ll ship orders for free. Why not take advantage of this rare offer where they’ll give you free shipping AND 15% off your order?!

I guess it would help if I told you to click the image above to take advantage of the limited time offer….

So, if you have any last minute Father’s Day gifts to buy or you’d like to treat yourself to the new Garmin Forerunner 405, head on over to Road Runners Sports and take advantage of their great offer.