This is David from the Holy Micro! Support Team, the maker of the SkyVoice Alert. I am not a pilot. I just provide software support at Holy Micro.
Let’s go over the supply details. A LHA unit needs to be installed on an inspection plate either under a wing or under the fuselage. This requires 15 to 20 feet of aircraft grade shielded electric cable with 5 conductors to connect the unit to the instrument panel. This cable alone costs $75 - $100. Then you also need fuses, switches, Solder sleeve, butt splices, and screws to make the connection work and meet the FAA requirement. If there are no stickers the installer needs to make those stickers which again cost time and money. In order to mount the LHA to the inspection plate, the inspection plate needs to be cut and new holes need to be drilled. This is addition time and money. An inspection plate kit for the MicroKit LHA costs an additional fee of $45 - $65. We include a precut inspection plate in our kit, and we also offer to cut customers inspection plates at no charge. We also offer decals to use as a template if you want to cut the inspection plate yourself. You can even download files from our website so you can cut the inspection plate on a CNC machine. All of this is included in our price. In any case, by including all of the supplies and free fabricated wiring harness and stickers it is saving the buyer time and money. Therefore installing SkyVoice alert should take less time than MicroKit.
I know that the SkyVoice Alert gear warning starts at 560 feet and our reminder start at 500 feet. Pinecone wrote that his gear warning / reminder only starts at 200 feet. This means that you have less than 30 seconds to put the gear down and land. I think this is not enough time, therefore you have to go around. With SkyVoice Alert 500 you have over a minute, enough time to put the gear down and still land. To me that is a great value.