There's others out there that love them but not a ton. Many like more vintage from the 70's or they love Electrolux. There are many on this site that are extremely loyal to Kirby. I've never gotten into Kirby much myself! I'm young but just find the Kirby's too inconvenient with their tool setup, heft, no brush roll shutoff, bulk, non reclining power carpet head, etc. The G series in tool mode is too obnoxious on my ears too!!
I grew up with a lot of Hoover canisters, so I've gotten used to their pigtail cord system and attachment switching. I can switch tools on the Hoovers from power nozzle to running to something else in about 5 seconds! I just find them very very convenient and reliable. My family got a Kenmore Progressive canister around 2006, it went in for Sears service twice in less than 2 years time and then I just decided to see it off on Craigslist as it still wasn't sounding great and the attachments/ power nozzle weren't convenient as nor cleaning up our labrador retriever pet hair as well as the Hoovers!! I got a Hoover Windtunnel Plus Canister and that's been in the family running perfect and never seen a repair shop since buying it new in 2008! I've replaced the belt and filters a few times and that's it!! The belts on the Hoover canisters last about a year. They may be stretch but the torque and the power of the motors is excellent, there is absolutely no noticeable power, grooming or dirt pickup difference with them even at a years time on the belts!!
I've done house cleaning as a side for years and the Hoovers just clean so well and are extremely versatile for many surfaces. To ease work, I have an extra set of wands strictly for the bare floor brush. So my power nozzles always have a wand set and my bare floor brush always has a wand set. With that I can set my cord on the wand hooks properly once and not adjust it so I don't have wear issues where the wire leaves the housing either!!
See what Chris recommends for the bearings. I've never had a problem with them!! My family has had several Hoover PowerMax/ Windtunnel canisters in the family over the years between various houses and floor levels in each plus my collection and gifting! I've only seen 2 motors go bad and that's only because my sisters X-Fiance broke 2 vacuums in one day trying to clean underneath their leaking dishwasher!!! He sucked water up into both machines. He's damn lucky he didn't electrocute!!
I've been able to grease the top bearing. I don't like taking fans off the shafts and I haven't issues so I've never ever even had to grease a lower bearing by the fans!! Not even on my parents oldest PowerMax which is their S3603-040 9.8 Amp one which was purchased in September 1997!!! The machine runs absolutely phenmomenally still! The bag door, cord winder, tool door and hose have been replaced but the power nozzle and main motor and all the rest have been fine. The other parts were replaced because it's almost 20 years old and MANY house cleaning employees that my parents have had for help over the years have abused those machines!!! One cleaning lady dropped that machine halfway down a flight of steps onto tile floor. Machine still worked fine. Just had to do some handle repair.