Generally speaking, minimum water supply pressure for small (20-50 gpd) RO systems is 40 psi. Higher pressures ARE helpful - but I'd be VERY reluctant to install such inside a home! Generally speaking, the types of fittings usually used are pretty cheap, and consequently leaks are not at all uncommon. Personally, I prefer ANY RO system to be located in the garage in an area where leakage can occur without causing damage - because sooner or later , it WILL leak - period.

Look at the average small RO, and count the connections - the average connection has at least two leak points - the threaded part and the part where the tubing or piping connects. The push-type connections commonly found are, IMO, some of the worst offenders - but manufacturers love 'em because they're cheap and assemble fast, makin' labor costs lower. The fact that they leak in a couple of years isn't their problem - but at this time, no one is using the better-quality fittings because to do so would put their price points too high and folks won't buy them.
They also make a inlet valve that installs inline (1/4" tubing in/out) and mounts on the floor, and if a leak occurs it shuts the water supply off. They run about $20-25 and aren't reusable (if they "trip", you have to replace them) - but it's cheaper than water damage!