Olly fitted a multi split air conditioning system to our house almost 2 years ago. 2 of the 3 indoor units functioned perfectly from day one. The third unit malfunctioned almost immediately. Olly returned several times and fitted new parts provided by the supplier before eventually diagnosing the issue himself and advising the supplier what the problem was and what part was required to fix it. He fitted the part that he had requested and since then all 3 units have performed as they should have from day one. The faulty part that was causing the issue was no fault of Olly's and it was only due to his professional manner and persistence that the issue was resolved. We now use the system more than the central heating despite the house being less than 8 years oId and I have no hesitation whatsoever in recommending Olly's company APEX for any air conditioning or similar works.