I know it’s easy to be critical, but I want to provide feedback. That placement into the base looks difficult and frustrating.
I see two main issues.
1. That clearly requires the installer to apply non-trivial force to lock it into place. Beyond it being awkward, a Graco Keyfit is a drop in, no force install. Amazing.
2. In most vehicles, fire-aft distance is a huge, limiting factor. It seems difficult, if not impossible to tell if the seat has latched into the correct position, without additional tilt. The Keyfit base makes this obvious since it will not latch into place at incorrect angles.
Feedback is always welcome. Thanks for checking it out! I may botch the response to your points, but I'll give it a try below.
Force > To use the base, yes some force is required. In our opinion, you want force to prevent false-positives on latching. False positives are a big problem with bases, as people perceive latching to have occurred when it actually has not. Visual latching indictors are not sufficient, in my opinion. Our experience and design encourages audio, visual, and tactile feedback to minimize misunderstandings and false positives.
Please note that while a base is convenient (people like the quick click-in, click-out of bases) it is not needed. You can just use the seat belt. Roll with whatever you prefer. Personally, I just use the seat belt.
Fire-aft> I have no idea what you mean by "fire-aft distance". But it sounds like you are worried about angles. We designed the seat to encourage good angles at rest, whether with the lap belt alone or with the companion base. Most automotive seats have a 5-10 degree upward angle. A rear-facing infant car seat should be resting in place at no lower than a 30 degree angle, and no higher than a 45 degree angle. If you go too high it increases choking risk but conversely improves the crash test scores. If you go lower it is better for a baby at rest and has less choking risk, but worsens the crash test score as more force is distributed into a smaller area and less rotation of the seat is possible. All this to say, there is a lot of variability across vehicles and seats in a vehicle, and to the best of my knowledge no car seat base accounts for all the permutations well. Regardless, angles are important because babies (especially younger ones) are still developing the muscles that hold up their head and have less head control than it might appear. For the parents out there, the final back angle should be approximately between 30 and 45 degrees as measured from a level plane, but please refer to your seat's user manual for its instructions. In most scenarios and vehicles the Kioma car seat should rest at an approximate 40 degree angle.
Competitor Comparison > We try to avoid direct comparisons with other companies, because it makes the lawyers wince. However, while I'm biased, from my personal experience I can say I'd take the Kioma any day over the competitors. There are many reasons we built this product, and none of them included "existing [insert company name] does a great job at this!"
"Fore-aft" distance is what I meant. Essentially, the distance from the back of the child's seat to the driver's seat. In nearly all vehicles we own (including mid-sized SUVs), it's a close fit to install a baby carrier. In some cases, the front seats will be pressing against the carrier (unavoidable in some cases). With a full base, it's very obvious when the carrier is being pushed up too far by the contact and we need to adjust.
Ah, ok, and thanks for clarifying. The Kioma base is low profile (vertical height), and only 1/2 inch out from the passenger seat upright face (your "fore-aft" distance). It does not extend out past the seating face of the passenger seat, or otherwise hang off the passenger seat. Low and slim generally results in a shorter moment arm from the anchorage point (where the latch/isofix mount points are), so reduces the collision forces for the seat/baby.
The Kioma seat is about a standard length, and the width is narrower than competing seats while fitting the same size baby.
Fun fact: the International Standards Organization (ISO) helpfully defined several envelope sizes (r1, r2, etc) to help with baby car seat standardization, and the EU crash regs (see UN r129) even have a test bar that represents the back of a driver's seat.
I see two main issues.
1. That clearly requires the installer to apply non-trivial force to lock it into place. Beyond it being awkward, a Graco Keyfit is a drop in, no force install. Amazing.
2. In most vehicles, fire-aft distance is a huge, limiting factor. It seems difficult, if not impossible to tell if the seat has latched into the correct position, without additional tilt. The Keyfit base makes this obvious since it will not latch into place at incorrect angles.