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Self-managed tours give you the flexibility and independence to schedule your itinerary the way you want – you can decide where you want to stay, which attractions you want to see and how much time you want to spend for a particular attraction.
This works well for people who are having higher budget and are say connoisseur – are specifically going to see / do a particular thing. But it comes along with the pain points like arranging a hotel, managing transportation etc. You should be ready with the addresses, modes of commutation and should forego the costs associated with transportation. Unless you are ready to use public transportation (which may be time consuming), you have to shell out the money for cab which is again expensive.
So, for people travelling on tight budgets, in my opinion, the tours operated by tour operators like tours4Fun are the best way out. I could list out following points favoring this:
1) The tour is virtually hassle free and tension free.no worry, if you don’t have the smart-phone to tell you the way out if you are stranded – you can leave it totally to the operator and simply sit back and enjoy
2) Cost is another main advantage in these tours – the number of places and coverage of these tours is good. If you manage to see these places by yourself, there are chances you might end up paying more amount
3) People often say that these tours are rushed but given the coverage and the skills /preset plans with which tour operators work managing big groups, I feel these kind of tour plans comes as a result of extensive cycle of working on feedbacks and incorporating them in itinerary
4) You may end up making good friends on the tour and if you are travelling in group, no need to guide your group, just let them follow the our guide- you can enjoy on your own

I recently took 3 day SFO tour with Tours4Fun and had a great experience in this well managed tour. Few months back, I went to self-managed/planned Las Vegas tour (with the same group as SFO tour); which now I feel was more stressful.
The kind of tension free tour which I had on SFO tour with tours4fun had made this experience, a memorable one.
So, depending upon the budget one have in mind, the coverage wanted and objective of the tour
(Whether one wants to see many places or only specific places of interest), choice can be made between both the options.