Uponor ep manifold system

Wondering if anpyone has used them and what they think being the price is about 1/ 3 of there brass or ss manifolds . Also are these doomed to be a issue in 10 or 15 years .looked at a job w embassy systems plastic Mono block manifolds .the few I ve assemblies and installed have been fine but I run into these where there leaking like a sieve .it seems no one stocks them any more or parts .i would hate to install yet another plastic manifold and have it leak again .on another note it’s so nice when the heating contractor install like 7 of these pos and installs not a single isolation valve on anything aside from the water feed .aside from that a oil boiler piped like they had there eyes removed and knew they shall never return to service or repair I thank god that I don’t have to service the boiler being even if you got the top off I don’t think u could ever brush it down being the expansion tank is bout 1 off center power vented barometric screwed closed air tight home can u say soot .nice large 20 year old house white carpet basement w oil .funny I could smell oil about 15 seconds upon entering .cant make it up all radiant w a hitemp oil boiler the control set is as stupid as the piping .it really needs a total re do but they finished the basement and have a welltrol water softer amtrol 80 gal plus the boiler and a 275 gal oil tank in maybe 4 1/2 ft x 12 ft space don’t forget about 8 circ mounted behind the boiler on a ratty 2 x 4 w plastic nail on .its a miricale it works mostly because I did not do it lol .done w my rant so how bout those Mets .peace and good luck clammy