Just to add my experiences to the big Pioneer thread. I purchased a 120V, 9K Btu system, shipping was relatively quick on 2 mini-pallets. Liftgate delivery at no added cost, which was nice. Pallets were banged up, but the packaging did its job and nothing inside was damaged. I used a wall bracket, so couldn't use the heavy anti-vibe feet that I purchased, but if it was pad-mounted, they looked pretty sturdy. I'll use them for something else. The included condensate drain line is really cheap, so I swapped it with heavier-wall marine bilge pump tubing.
I had ordered a 25' lineset, it came packed separately. I cut about 3 feet off of. I didn't need a special flaring tool, my old brake line flaring tool worked a treat. I did forget to put the flare nut on the liquid line before flaring it the first time (as per protocol), but I had plenty of extra to cover the difference. I purchased a RobinAir 15310 vacuum pump, Mastercool 59661 gauge/hose set (with integrated shutoffs, which are key), a YJ R410a adapter, and a CPS micron gauge. I had THHN around from other projects, but elected to purchase some 14-3+g UF-B to run from the inside unit to the outside unit as per local code. This isn't available at a big-box store, they only had 14-2+ground, and I needed 14-3+ground. I already had a Nitrogen tank and regulator for the low-pressure test, but needed to buy a high-pressure regulator to run the full-pressure 450PSI test.
Basically, I followed the install instructions, mounted the indoor bracket, drilled the hole at the requisite angle, mounted the indoor unit, connected the lineset, drain, and UF-B, ran the lineset cover base, bundled the first few feet of the lineset, ran and secured the lineset to ground level, did the electrical connections first, then cut and re-flared the lineset. Connected it up, did a vacuum pull to 500 microns to check for gross leaks, then 150PSI N2 pressure test with leak-check solution on all joints. When that had held overnight (not necessary, but it was late when I got it installed), I did another evac to 500 microns, held for an hour, then N2 to 450PSI again held overnight. Finally, I changed the oil in the vacuum pump, pulled it to 300 microns, waited 3 hours (it held at 380 microns), and released the charge. Tested the AC, tested the heat, cleaned everything up... done and finished!
All told, almost $500 in tools, $750 shipped for the system, and $350 in additional supplies (lineset cover, AC disconnect, conduit and fittings, UF-B). $1535, and I've got the tools to do it again, extra lineset cover that I'll likely sell, and a bunch of experience. If I wanted, I could sell the tools as well. Not bad compared to $4000 quoted install price from 2 local companies.
Pictures:
Lineset run, everything mounted. I used the 4.5" Fortress cover from Rectorseal, and should have gotten the 3.5", but the supply house was out of stock and I didn't want to wait another week to get it from Amazon (they were backordered as well).
Pressure Test at 450PSI from a Dry Nitrogen tank. I did a full triple-evac on the system.
Final micron reading before releasing the charge.