Some background first: I visited Nepal in Feb/Mar 2017 with the aim of doing a solo trek to EBC. My aim was to do everything on my own - flight and stay, permits, carry my own load without porters etc. I'd only done a couple of day treks so far and this was to be my first proper trek. Since I had a lot of time at hand I figured I'd take it really easy and be able to pull it off. FYI - when I arrived at Lukla, sense prevailed and I did hire a different guide (not Bishnu) but also carried my load about 50% off the way. Hire a guide its helpful to the person and Nepal's economy. If you think you are fit enough don't take a porter and if push comes to shove, your guide can help you for short durations with your load. I used to exchange my 17kg backpack with my guides 7 odd kg backpack.
About the guide: I'd describe Bishnu ji as personable, helpful and knowledgeable.
I met him at Thamel (Kathmandu) at some office where I was trying to get one of the requisite permits. Turned out I was at the wrong place and Bishnu helpfully accosted me. He told me he was going to the correct office and asked if I'd like to walk with him. It was about 2-3 hours that I ended up spending with him. I'd told him upfront I was not looking for a guide and he was totally cool with that but very helpful. He assisted me in filling out the correct form at the correct office. We talked at length during the walk to and from Thamel to the office in Bhrikutimandap area. I took inputs from him and advise which he readily shared despite knowing I would not be using his services. Further, we connected nicely and I see that he knows his stuff and has been in the business for quite some time. We met up for tea later in the evening in Thamel and he graciously gave me a map of Sagarmatha region as I'd mentioned earlier that I'd need to procure a map.
I look forward to going on a trek with him (god knows when that'll work out though) and wish him all the best!