I tend to waste money and try different brands and devices and then decide which i like the best and works the best over the long haul and get more of those.
for instance when i started there were not a lot of devices.. settled on ge switches and outlets.
eclink contact and motion sensors, (they were like the only one that had a setting to avoid animals setting it off, plus there batteries last like over a year). Their motions are slow to reset though and that is why batteries last.. when they go off they don't reset for 3 minutes.. if that is ok (it is for me as i use for delay light on/off anyway) than fine,, if not look elsewhere. the nyce ones are nice and fast responding, Just tried my first one but they are expensive and i am having issues with spotty temp reporting.
for temp/multi sensors went through quite a few that would not work inside my freezer and battery would last more than a couple of weeks. Unfortunately the st814's are no longer made..
The ecowitt weather station has nice wh31 sensors that can be bought for 12 bucks or so.
For dry relays have settled yet on one.. i have tried zooz and mimo and have had issues with each.
Colored lights: hues and the best especially when you can offload it to the hue hub and response iss still instant.. I am slowly replacing my sylvania/lightify lights with these and they start acting up and dropping off the net.. But there are really no replacements for the outdoor gardenspots that I have yet found (strips are not the same as bulbs that you can aim for instance at the house or bushes)
For water sensors i have jumped around and had issues with aeon and dome etc. with false alarms when batteries get low.. There i also settled on ecolink zwave plus as they have been most reliable.
same for water valves..the best if you can afford it (expensive) and pay for a plumber to install is one like water cop or leakgopher that don't have a moveable arm that turns your valve off and on.
I have gone through quite a few with the moveable arm models that stick part way or are just flakey.. Of those in my opinion dome is one of the best ones..
For plug in switches my favorite so far is the zooz zen06 but not sure they are made anymore or avail. They don't overload your mesh with events and are very strong repeaters in my opinion.
Another multisensor i like with a colored nightlight is the Homeseer HSM200
For garage openers after trying the go your own devices and integrated I like the gdz008 new zwave plus model.
For locks i recently converted all my locks from zwave to zigbee.. i use kwikset but others seem fine..Zigbee is much more reliable in my opinion. And i like the single key on the kwikset so we have one key between all our properties.
Repeaters: Aeon range extender 7, and ring v2. Put 2-3 on each floor of your house.
For zigbee switches I use the sylvania smart+ again i use as repeater.. A couple on each floor.
Get an aeon zstick to remove a failed join in a pinch.. Have it ready if needed already joined to your system and Zwave programmer installed.
Put hub centrally located in house if possible and immediately put in your repeaters/wired switches buiding out from the hub.
Of course these are just my experiences take it or leave it..