The suspension design of the Haste helps it go up technical trail well, and even without using the climb switch on the Double Barrel Air there was plenty of support. The bike feels light and nimble heading uphill; there's no unwanted mushiness when stomping hard on the pedals It felt efficient as it sat up well in its travel, and has no issue pedaling over or through obstacles.
The seat angle does feel slack, and once I got around to looking at the geometry chart my impressions were confirmed. The slack angle puts the pedals farther out in front, and even with the seat slammed forward and on longer climbs I struggled with my hips becoming tight, something I rarely experience with other bikes in this category.
I rode the 62 cm size frame. With the frame this size the collar of the seatpost was bottomed out on the frame with no room to go any lower in order to achieve my preferred seat height. If you're ordering a Haste - pay attention to the sizing and make sure you're on the correct one. The seat tube heights are taller than average, which may limit how long of a dropper post you can use.
I knew I would be right on the cusp of seat tube height and could deal with that, but with the reach on the 62cm size (equivalent to a large from most other manufacturers) is a scant 438mm. Had I sized down to the 59cm, it would have been 411mm. To put that in perspective, Specialized's Stumpjumper which we have tested
and agree has fairly conservative geometry has a reach of 435mm on a size medium; their small is 415mm.
On a more positive note, more technical sections of trail felt very manageable at a lower speeds - the Haste was very precise and easy to maneuver through tighter turns, although the front end did feel a little light at times during steep, seated climbing efforts.