We have owned a Triton for 8 years. It was built to our design - a thing that Triton were happy to do at no extra cost.
As we were not bothered with engine type we were happy to take the Triton standard one for our length of boat... The Lombadini engine in it is a 4 cylinder rated 34hp and is at the cheap end of the engines available range. Running it from new we found it perfectly normal and reasonable for the first few years.
When it needed a scheduled service (at 2000hours) I did have problems at first finding an engineer who knew the engine. However we were luck as at Warrington a firm (who is on the servicing lists as being in Liverpool but had moved) had an engineer who was previously a fully trained Lombadini engineer (when that firm had their own engineers rather than using agents) and he knew their engines backwards. He stripped and tuned the beast and the final result compared to the original is amazing!
Now engine is smoke free and can be run flat out (3,400rpm in gear). In fact we only wind it up out of gear (to 3,600rpm) as once moving even on a shallow canal at a third throttle the engine can move the boat at fast walking place. Overall the engine uses a litre of fuel per hour when running and all spares are available. Some say that our engine - being shiney unpainted metal - does not look as good as some engines on the market but ours works very nicely thank you!
Mentioning servicing the engine is fully marinised, with spares under the fram label or lombadini originals widely available and all oil changes, filter changes, etc. are done from the top rather than in back-breaking positions. Of course you need to put a tray under to catch the oil when you change the oil filter. In fact the only difficult bit of maintainance with our boat is oil change for the PRM gearbox whose drain plg requires a large 1" spanner and is located under the box. In theory the oil in this gets changed with the various engine filters at roughly 200-250 hours running, while the engine oil gets changed every 125 hours.
Finally on the subject of fuel, although Triton did not fit one we were advised to fit a rough filter/ water trap between the fuel tank (rated 40gallons but holds 52) and the other filter. This we would recomend as the rough filter while catching a lot of the crap one finds in red diesel only uses a cheap replacable filter which we found from experience extends the life of the more expensive filter up the line. It also stopping watery fuel reaching the engine. Such impure fuel in a Lombadini can lead to erratic running - this usually when you above a large unfenced weir - which is not a pleasant experience.
To finish the engine comments we were told that this line of engines were originally developed to power milk delivery trucks in Italy - which may account for ours not being too worried about being worked at high revs!
As for the rest of the boat as Triton is a firm at the cheap end of the market they tend send boats out with little jobs that need to be done to make them into your dream boat. Having said that I have looked at boats that cost twice as much which have a lot more wrong with them when they are handed over. Certainly, after getting over the initial teething troubles and having fixed the bits where screws are better than nails or glue we have been very happy with our boat and continue to enjoy it.