There's plenty of room for opinion that's what the comments are for :)

best overall exchanges
eu
kraken

uk
bittylicous

us
kraken

worldwide
coinmama

post headline=exchange name rating n/10
eg bitpanda 9/10 coincorner 6/10

1 line summary review
eg Helpful but slow over weekend

platform
eg btcbit.com website, coinbase ios app

currency name->currency name
eg gbp->btc eth->usd

deposit fee
eg 1% 5%

exchange rate vs blockchain.com/prices
spread
eg 10,200 vs 10,823
+6.1%

deposit fee
eg +1% for depositing from card

verification requirements
eg sms, goverment ID

time to verify
in hours or days

live chat help?
yes or now

Just dropped to £2

6/3/21

Is bitpanda still fucked for smaller transactions? It seems they have a minimum transaction threshold going.

1 - stay away from major exchanges like coinbase, they share the most data with the most other people
2 - an exchange outside your country is better than an exchange in your country.
3 - peer to peer exchanges are better than centralized exchanges but data saved by the exchange is within the reach of government authorities.
4 - bitcoin atms often only require a telephone number

summary
Expensive but fast

platform
coinmama.com website

currency exchanged
gbp->btc

exchange rate vs blockchain.com/prices
spread
£8,378.15 vs £7,938.05
+5.5%

deposit fee
5% for credit card
0% bank transfer

live help
no

verification requirements
government ID and selfie

time to verify
3 hours

Paybis.com - 8.5/10

Summary:
Responsive team, nothing shady, OK exchange rates depending on the payment method, very fast, wide variety of payment methods

currency exchanged
GBP, USD, EUR->btc

exchange rate vs blockchain.com/prices
spread
Depends heavily on what payment method you use

Credit card: USD/EUR/GBP +11.2%
Neteller: USD +9.7% EUR +9.6% GBP +7.3%
PerfectMoney: USD +8.7% EUR 9.92%
Skrill: USD +9.7% EUR +9.6% GBP +9.6%
Payeer: USD/EUR +8.3%
AdvCash: USD +8.9% EUR +8.7%
SEPA (Europe): +2.63%
WIRE (USD): +3.19%

deposit fee
none, although the rates received with different payment methods differ a lot


live help
Yes, and responsive support in general

verification requirements
government ID and details for low level trades, for high value trades expect to be asked to show a selfie with your ID and possibly a handwritten note and credit card


time to verify
Very quickly for me, 12 minutes. The founder claims that most verification happens almost instantly, otherwise they have staff working 24/7 for manual verification. They guarantee a response about the inital KYC request within 5 minutes at all times. Their marketing slogan is "It just takes 15 minutes for new users to complete a transaction with credit card".

Online consensus on Paybis:
After trawling through forums and review sites, I can't see anyone saying that they screwed them ever. Their rates for certain payment methods are a little high, but the wide array of possible methods as well as the customer support and speed they process is well received. They have a good 4.7 score on TrustPilot, and they send the TrustPilot review link to every customer.

Overall:
I was impressed with Paybis and I'm surprised they aren't mentioned more often in discussions of good exchanges. They are transparent, fast, professional, and trustworthy, even if their rates for some payment methods aren't number 1.