I've flown about 150 hours since qualifying, got my IMC/IRR, and still count myself very much as a novice. One of my pet hates, though, is having a pilot in the right seat. I'll quite happily fly with almost anyone as a passenger and deal with whatever crops up (so far safely, fingers crossed and all that ) But put someone in the right seat who I know knows what they are doing and subconsciously there is then a get out if the going gets tough. (I know legally there isn't, I am PIC, but you can't always help the subconscious).
I'm similar level of experience to you 150 driver and the above point is an excellent one.
If you do double up with another pilot as I have done, make sure it is with someone who will allow you to make your own decisions and respect your authority as p1 for that leg. The dynamic of the relationship must be unambiguous in this regard. Constructive advice is useful but the old adage "too many cooks spoil the broth" is perhaps truer in flying than other areas.